JONES STEPHENS PEXALGAS Gas Piping System Installation Guide

: August 12, 2024
: JONES STEPHENS

Table of Contents

JONES STEPHENS PEXALGAS Gas Piping System
Product Information
Product Installation Instructions
INTRODUCTION
SYSTEM OVERVIEW
GENERAL INSTALLATION PRACTICES
TUBING ROUTING
APPLIANCE CONNECTIONS
SIZING TABLES
References
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JONES STEPHENS PEXALGAS Gas Piping System

Product Information

The Jones Stephens Gas multilayer system combines the positive features of crosslinked polyethylene PEX-b and aluminum. PEX-b offers excellent mechanical, physical, and chemical properties while the butt-welded aluminum pipe enhances mechanical resistance, flexibility, and malleability for easy installation. This product is composed of different layers of material, connected to each other, allowing for excellent properties that wouldn’t be possible with a single material pipe.

Specifications:

Working Pressure: Up to 72 psi
Material: Multilayer system combining crosslinked polyethylene PEX-b and aluminum

Product Installation Instructions

Design and Installation: Design and install the system according to the requirements provided in the guide. Use only Jones Stephens piping components as specified.
Compliance: Follow local codes or National Fuel Gas Code ANSI Z223.1 in the USA, and CAN/CGA – B149.1 & B149.2 in Canada. Local code takes precedence in case of conflicts unless approved by the local authority.
Inspection and Testing: Perform inspection, testing, and purging according to National Fuel Gas Code ANSI Z223.1, CAN/CGA – B149 installation Codes, or local codes.
Underground Installation: When burying underground, lay pipes at least 3 feet away from waste pipes and above them. Use an appropriate bedding and cover with at least 8 inches of fine sand or strained clay.
Piping Handling: Unwind and route piping carefully without kinking, tangling, or applying excessive force. Cap piping end before installation to prevent contamination.
Precautions: Avoid sharp bends, stretching, kinking, twisting, or contact with sharp objects during installation. Replace tubing if damage occurs.

FAQ:

Q: Can components from other PEX-AL-PEX systems be used with Jones Stephens piping?
A: No, only Jones Stephens piping components should be used as they are not interchangeable with components from other systems.
Q: What is the maximum working pressure for the Jones Stephens Gas Piping system?
A: The system is certified for working pressures up to 72 psi. Contact Jones Stephens at 800.355.6637 or visit jonesstephens.com for further assistance.

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PEXALGAS®

Installation Instructions English

Jones Stephens PEXALGAS® Installation Instructions
AT TENTION!
The installation of Jones Stephens PEXALGAS® piping must be performed by a trained installer as required by the state and local administrative authority administering the provisions of the code where the gas piping is installed.
All systems using Jones Stephens piping shall be designed and installed according to the requirements of this guide.
Only Jones Stephens piping components may be used in the system. Components from other PEX-AL-PEX systems are not interchangeable. Only components supplied or specified by Jones Stephens shall be used.
Installation shall be in accordance with local codes, or in their absence, in accordance with the National Fuel Gas Code ANSI Z223.1 in the USA, and CAN/CGA – B149.1 & B149.2 in Canada. In cases where the requirements of this guide conflict with the local code, the local code must take precedence, unless the local authority having jurisdiction approves a variance, or change.
Inspection, testing, and purging shall be performed according to the procedures in Part 4 of the National Fuel Gas Code, ANSI Z223.1, and CAN/CGA – B149 installation Codes or in accordance with local codes.
This system and related components (pipes, fittings, and tools included in the Jones Stephens PEXALGAS® catalog) shall be used only in gas piping systems where the operating gas pressure does not exceed 72 psi (5 bar).
Piping may be buried underground. Underground pipes must be laid at a distance of at least 3 feet from any waste pipes and they must be positioned above the same. The piping does not require any protection in particular when laid underground, as long as an appropriate bedding is prepared for the pipes and the same are covered with a layer of at least 8 inches of fine sand or strained clay.
Jones Stephens does not recommend the burial of brass fittings, but if the fittings are installed in particularly moist conditions, embedded in soil, or subject to particularly aggressive compounds (such as concrete or cement mortars) they need to be protected. In such cases, the installer shall cover the fittings with self-joining bituminous tape. The installation of Jones Stephens PEXALGAS in solid floor should be in accordance with IRC sections G2415.8.1 and G2415.8.2, IFGC sections 404.8.1 and 404.8.2. Tracer wire shall be installed adjacent to the underground piping in accordance with IRC section G2415.17.3, IFGC section 404.17.3. Underground pipes that enter the building must be fitted with a sealed sleeve at the end, in order to prevent water, gas and animals from entering the building.
The PEXALGAS® pipe is typically routed: · Beneath, through and alongside floor joists · Inside interior wall cavities · On top of ceiling joists in attic space
The PEXALGAS® pipe does not have a fire rating for runs through plenums that is required by most building codes. If your building code requires products to have a certain rating established by the ASTM E84 testing specification, then PEXALGAS® shall not be installed through a plenum.
Carefully unwind and route the piping from the reel to the required location, making certain not to kink, tangle or apply excessive force.
Piping end must be temporarily capped closed prior to installation to prevent contamination from foreign material.
When installing Jones Stephens gas piping avoid sharp bends, stretching, kinking, twisting, or contacting sharp objects. The tubing shall be replaced if damage occurs.

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Installation Instructions English

IMPORTANT – READ ENTIRE MANUAL
This document is the sole property of Jones Stephens. It shall not be copied or reproduced without the prior permission of Jones Stephens.

INTRODUCTION

USER WARNINGS
The use of fuel gas can be dangerous. Special attention must be given to the proper design, installation, testing and application of the gas piping system. Sound engineering practices and principles must be exercised, as well as diligent adherence to the proper installation procedures to ensure the safe operation of the piping system. All installed systems must pass customary installation inspections by the local building official have authority prior to being placed into service. This document is intended to provide the user with general guidance when designing and installing a Jones Stephens piping system, its use with any other gas tubing system is inappropriate and may result in serious bodily injury and property damage. When local gas or building codes impose greater requirements than this document, you should adhere to the local code requirements. Performance of accessory devices, such as pressure regulators and shut off valves, should be reconfirmed by contacting the accessory device manufacturer and receiving the latest technical data on sizing, installation, and performance.
Improper installation methods or procedures could lead to accidents such as explosions, fires, gas poisoning, asphyxiation, etc. This system shall be installed with strict adherence to this guide as well as local building codes. All installed systems must pass installations inspections by the authorized local building official prior to being placed into service. Jones Stephens shall have no responsibility for any misinterpretation of the information contained in this manual or any improper installation, repair work, or deviation from the procedures recommended in this manual, whether pursuant to local building codes or engineering specifications.
Jones Stephens piping components shall not be used with other PEX-AL-PEX piping systems from other manufacturers.
Jones Stephens piping shall be used only in gas piping systems where the operation gas pressure does not exceed 72 psi (5 bar). Accessories for systems shall be rated for the operating gas pressure used. Thus, for example, accessories for 25 psi systems shall be rated for 25 psi service. Performance of accessory devices, such as pressure regulators and shut-off valves should be reconfirmed by contacting the accessory device manufacturer and receiving the latest technical data on sizing, installation, and performance.

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Installation Instructions English

A gas delivery system consisting of Jones Stephens piping offers significant advantages over other gas delivery systems because of its wall dimensions and design. In contrast to copper or rigid steel pipe, Jones Stephens piping does not require intermediate joints in most installations because the piping is capable of being installed in one continuous run, reducing not only the total number of joints, but also the potential for leaks at joints. Jones Stephens piping’s flexibility also affords more installation options because an installer can avoid existing obstacles, and it eliminates repetitive measuring, cutting, threading and joint assemble that are common with rigid piping systems. Jones Stephens piping’s flexibility offers further safety advantages in geographic areas that are prone to seismic activity because the tubing provides greater flexibility to withstand certain movement of the ground or structural shifts. Jones Stephens fittings are insulated to eliminate metal to metal contact between pipe and fittings. To maximize protection of the entire structure from lightning damage, installation of a lightning protection system shall be installed per NFPA 780 and other standards, particularly in areas prone to lightning. Note that lightning protections systems set forth in NFPA 780 and other standards go beyond the scope of this manual. Users of Jones Stephens piping systems shall consider all the limitations and benefits of Jones Stephens piping systems for their particular situation.
LIMITATION OF MANUAL
This document is intended to aid the user in the design, installation and testing of Jones Stephens piping systems to distribute fuel gas in residential housing units and commercial structures. It would be impossible for this guideline to anticipate and cover every possible variation in housing configuration, appliance loads and local restrictions. Therefore, there may be applications which are not covered in this manual. For applications beyond the scope of this guide, contact Jones Stephens. The techniques included within this guide are recommend practice for generic applications. These practices must be reviewed for compliance with all applicable local fuel gas and building codes. Accordingly, where local gas or building codes impose greater requirements than this manual, you should adhere to the local code requirements. This system and related components (pipes, fittings, and tools included in the Jones Stephens PEXALGAS® catalog) should only be used as fuel gas piping where the operation gas pressure does not exceed 72 psi (5 bar).
LISTING OF APPLICABLE CODES AND STANDARDS
Jones Stephens Gas Piping System complies with the following codes: · 2021, 2018, 2015, 2012 and 2009 International Fuel Gas Code® (IFGC) · 2021, 2018, 2015, 2012 and 2009 International Residential Code® (IRC) · 2021, 2018, 2015, 2012 and 2009 Uniform Plumbing Code® (UPC)
Jones Stephens Gas Piping System complies with the following standards as certified by the ICC-ES PMG-1588 certificate:
· ASTM F1281 Standard Specification for Cross-linked Polyethylene/Aluminum /Cross-linked Polyethylene
· ISO17484 Specification for Multilayer pipe systems for indoor gas installations
· AS 4176.8-2010 Metal-Plastic Multilayer Pipes and Brass Fittings for Conveying Combustible Gases in Systems in Pressure up to 5 bar

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Installation Instructions English

DESCRIPTION OF SYSTEM AND COMPONENTS
Piping
The Jones Stephens PEXALGAS® Gas Piping System has been engineered, tested, and certified to meet the performance requirements of American Fuel Gas systems. As such is acceptable for use with all recognized fuel gases, including natural gas and propane (LPG).
The Jones Stephens Gas multilayer system combines the positive features that are typical of crosslinked polyethylene PEX-b and also those of aluminum; crosslinked polyethylene PEX-b offers excellent mechanical, physical and chemical properties and the butt-welded aluminum pipe strengthens mechanical resistance introducing excellent characteristics of flexibility and malleability, fundamental features for accelerating and simplifying installation operations.
The result is a product that is composed of different layers of material, connected to each other, that allows excellent properties to be reached that otherwise would not be possible with a pipe made of one single material.
The Jones Stephens Gas Piping system is certified for systems with working pressures up to 72 psi.
Attention: Do not store or install PEXALGAS® exposed to direct sunlight.
Fittings
Jones Stephens Crimp Fittings is a system of crimp fittings suitable for a variety of applications. By using a portable crimping machine equipped with a suitable jaw, the pipe is shaped around the fitting insert. Even in the presence of temperature fluctuations, the joint remains perfectly gastight and cannot be loosened thanks to the stainless-steel sleeve that covers the portion of pipe in contact with the insert. The sleeve has inspection holes to verify the correct insertion of the pipe on the fitting.
The PEXALGAS® Crimp Fittings require the use of Jones Stephens approved PEXALGAS® crimping jaws or the Jones Stephens PEXALGAS® manual crimper, designed specifically for Jones Stephens PEXALGAS® systems.
Protection Devices:
Protective devices are to be used when piping passes through studs, joists, or other building materials that limit or restrict the movement of the flexible piping making it susceptible to physical damage from nails, screws, drill bits and other puncture threats. · Striker plates (hardened steel Gauge 16) to be attached directly to studs and joists. · Strip wound metallic conduit shall be used in locations where additional protection may be required.
Pressure Regulators:
Required to be used to reduce elevated pressure, over 14 inches water column (1/2 PSI), to standard low pressure required for most appliances.

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DESCRIPTION OF SYSTEM AND COMPONENTS
Manifolds:
· Multiport gas distribution manifolds supply multiple gas appliances in parallel arrangement from a main distribution point.
· Multiple sizes and configurations ranging in female NPT sizes ½ through 2 with 3, 4 and 6 port cross manifold configurations.
Shutoff Valves
Used to control the gas flow. Ball valves shut off the gas supply at appliances, manifolds, & regulators. Valves can be utilized at manifold locations reducing the number of joints due to the integrated fitting connection.

SYSTEM OVERVIEW

INTRODUCTION:
The following section will be used to assist you while you design and size your Jones Stephens Gas multilayer system. At any point in which you require further assistance with this process you can visit our webpage (jonesstephens.com) or contact Jones Stephens.
It is required by this standard to provide installation instructions which include proper sizing tables and methods of sizing.
SYSTEM DESIGN
In order to properly design a fuel gas piping system, you must first recognize all the important criteria. Requirements for a proper system design include: · Verify your system meets all local codes. When local codes conflict with the manufactures guidelines the local
codes must always take precedence. · Determine the supply pressure coming from the meter by means of a gauge or a rating supplied by the gas company. · Determine your total system demand for all appliances as well as the largest single load. · Prepare a floor plan sketch with the load and length combinations for all appliances. · Determine your allowable pressure drop.
NOTE:
Please note that Jones Stephens sizing tables refer only to the pipe without including any other losses. Sizing must be done in accordance with NFPA 54 (National Fuel Gas Code), using the pressure losses from both the PIPE and the FITTINGS sizing tables to allow a more accurate sizing of the system for your installation.
When choosing a pressure drop to size a Jones Stephens Gas multilayer system the minimum operating pressure of the appliance must be considered. Choosing a pressure drop that will reduce the supply pressure below the minimum operating pressure of the appliance will cause the appliance to perform poorly or not at all.

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Installation Instructions English

GENERAL INSTALLATION PRACTICES

ATTENTION:
JONES STEPHENS PEXALGAS® GAS PIPING SYSTEM IS AN ENGINEERED FUEL GAS PIPING SYSTEM AND AS SUCH, THE TUBING AND FITTINGS ARE NOT INTERCHANGEABLE WITH OTHER PEX-AL-PEX MANUFACTURER’S PRODUCTS. THE USE OF OTHER PEX-AL-PEX PRODUCTS WITH THE JONES STEPHENS GAS PIPING SYSYEM IS PROHIBITED.

A. All System hardware should be stored in its original package in a clean dry location prior to installation. Care must be taken to ensure the PEXALGAS® piping is not damaged prior to installation.
B. Piping ends must be temporarily capped or plugged prior to installation to prevent dirt or other foreign debris from entering the tubing.
C. PEXALGAS® piping exposed to extreme low temperatures shall be allowed to come up to room temperature prior to installation and all the related activities such as uncoiling, bending, cutting, chamfering, and/or connecting to fittings. Once installed, PEXALGAS® piping is able to withstand low temperature conditions, down to -40°F (-40°C).
D. Care must be taken to not kink, tangle, twist, stretch or apply excessive force to the piping or fittings. The Jones Stephens Gas Piping is a flexible piping system and can be bent during installation around obstructions. Avoid stressing the tubing with tight bends. Refer to the table for the recommended bend radius.

PIPE SIZE (mm)
16
20
26
32

PIPE SIZE (in)
3/8
1/2
3/4
1

MINIMUM BEND RADIUS
2″
3″
3″
5″

E. When installing in, through or around sharp metal structures (i.e. metal studs, sheet metal, I-beams), rubber grommets or protective tubing should be used to prevent any direct contact which could subject the piping to damage.
F. Tubing should be supported in a workman like manner with metallic pipe straps, bands, brackets, hangers or building structural components suitable for the size of piping support intervals are not to exceed those shown in the table below (see table under the Horizontal Run section on page 9). A proper support is one which is designed to be used as a pipe hanger, does not damage the piping during installation, and provides full support of the
tubing once installed. Plastic zip ties or cable ties are not to be used as the primary support for the PEXALGAS® tubing.

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Installation Instructions English

FITTING ASSEMBLY
1. Cut the pipe at a right angle using a suitable pipe cutter. Check the tidiness and the sharpening of the blade to avoid any ovalization or damage to the pipe.

2. Calibrate and chamfer the pipe to obtain a perfectly round inner circumference of the pipe. Always make sure that the reamer has no dents or damage as they would damage the pipe and compromise the seal.
3. Insert the fitting on the pipe checking through the sleeve inspection holes that the pipe has been properly inserted. Remove any residual material left inside the pipe.

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4. For crimp machines: Position the crimping machine so that the crimping jaw is aligned and in position with respect to the body of the fitting and tighten by pressing the start button on the crimping machine (for more details refer to the instructions supplied with the crimping machine). Use crimping jaws provided by Jones Stephens whose crimping profile (TH) is compatible with the fitting that you are installing.
For manual crimper: position the manual crimper so that the crimping jaw is aligned and in position with the respect of the body of the fitting and close the tool completely until it clicks (for more details refer to the instructions supplied with the tool).

5. Remove the crimping jaw and verify through the metal sleeve inspection holes that the pipe has remained fully inserted during the whole connecting process.

NPT Threaded Connections
Use Teflon (PTFE) tape or pipe thread sealants is acceptable if needed. Wrap PTFE tape clockwise 3-4 times. Apply thread sealant starting at the opening of the fitting that is significantly thick enough to fill the grooves of the first half of the thread only. The proper method of assembling tapered threaded connectors is to assemble them finger tight and then wrench tighten further to the specified number of turns from finger tight (T.F.F.T.) given in the table. Tightening torque should not exceed the values listed in the table below.

CONNECTION SIZE (NPT)
1/2″ 3/4″ 1″

T.F.F.T.
2-3 2-3 1.5-2.5

MAXIMUM TORQUE (ft-lb)
30 37 52

Do not use Teflon tape or thread sealant on any Jones Stephens PEXALGAS® crimp connections. Ensure thread sealant does not contact pipe or remain inside the fittings.

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Floor/Wall Mounting Fittings
When using the Jones Stephens Wall/Floor Mounting fittings it is necessary to drill an adequately sized hole using a hole saw. Please reference the table below to choose the proper hole saw for the fitting being used.

FLOOR/WALL MOUNTING FITTING 16 mm x 1/2″ 20 mm x 1/2″ 20 mm x 3/4″ 26 mm x 1″ 26 mm x 3/4″ 32 mm x 1″

HOLE SAW SIZE 7/8″ (22mm) 1-1/8″ (29mm) 1-1/8″ (29mm) 1-3/8″ (35mm) 1-3/8″ (35mm) 1-3/4″ (44mm)

TUBING ROUTING

VERTICAL RUNS
Vertical runs inside hollow wall cavities are the preferred location for installation of vertical sections. To avoid damage, tubing should be free to move within the wall cavity without immediate supports between floors but must be supported at the point of penetration between floors. Vertical run support spacing is not to exceed 10 feet, requiring hangers only where the height of each floor is greater than 10 feet. The run must conform to Section x Protection, if it is installed in a location that it will be concealed.

HORIZONTAL RUNS
Areas beneath, alongside, or through floor and ceiling joists or other structural members are typical installation locations for both residential and commercial applications. Structural members may be considered supports for horizontal tubing if they meet the requirements as specified in the table below. The run must conform to Protection Section of this manual, if it is installed in a location that it will be concealed.

PIPE SIZE (mm)
16
20
26
32

PIPE SIZE (in)
3/8
1/2
3/4
1

MINIMUM HANGER SPACING
40″ 50″ 60″ 80″

Expansion/Contraction of Piping
The coefficient of linear expansion of PEX-AL-PEX is 0.00017 in / ft * °F). The hangers use the flexibility of the pipes to accommodate the expansion and contraction of the straight lengths of pipe of the Jones Stephens PEXALGAS® system. Use of rigid clamps require accommodation for liner expansion and contraction of pipe. There are several techniques that can be used.

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Preliminary considerations
All materials are subject to expansions or contractions, which are caused by the increase or decrease in temperature. The variation in length L of a pipe of length L caused by a variation in temperature T between the temperature at which the pipe was installed and the current temperature is given by:
L = · L · T
where, is the coefficient of linear heat expansion of the material. The following figure can be used to calculate the expansion or contraction of a pipe in relation to the difference in temperature to which it is subjected.

The prevention of such a variation in length in the material would generate a tensile stress (with T<0) or a compression stress (with T>0) given by:
= E · · T
where, E is the modulus of elasticity of the material. When calculating expansions or contractions, the difference between the temperature at which the pipe was (or will be) installed and the maximum/minimum temperature expected when the system is operating, must always be taken into consideration.
The coefficient of linear expansion of PEX-AL-PEX is 0.00017 in / ft * °F).

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Installation Instructions English

The effects of heat expansion and contraction of plastic materials influence the methods of installation of gas supply systems, which require different rules according to the type of installation chosen (refer to the following sections for further details).
Example: Calculate the linear heat expansion of a 26 ft PEXALGAS® pipe that is installed at a temperature of 50°F and is subject to a maximum temperature of 160°F.
By using the formula previously given and considering the heat expansion coefficient of PEX-AL-PEX, we have: L= · L · T = 0.00017 · 26 · (160-50) = 0.49 in

Compensation using a flexible arm (Type L)
This type of compensation avails of the changes of direction of the pipes; the segment of pipe (flexible arm) of length LB accommodates the movement as a result of the thermal expansion of a segment of pipe of length L perpendicular to it. In this case, the correct distance of the pipe from the walls must be guaranteed to allow the movement, it is therefore necessary to install the brackets according to the structure of the flexible arm.

The length of the flexible arm LB [in] is calculated using the formula:
LB = C · De · L
where C is the material constant, which for PEXALGAS® pipes is 33, De is the diameter of the pipe [in] and L is the change in length of the segment of pipe to be accommodated.

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Example: Calculate the length of the flexible arm of a PEXALGAS® pipe with a diameter of 1″ (32 mm) and a length of 160 ft that is installed at a temperature of 70°F and subject to a maximum temperature of 130°F.
The thermal expansion of the section of pipe is:
L = L T = 0.00017 160 (130 – 70) = 1.63 in
and, using the formula, the deflection arm LB is calculated: LB = C · De · L = 33 · 1.26 · 1.63 = 47.29 in 47.29 in = 3.94 ft
The same flexible arm (LB) is subject to a heat expansion of: L’ = LB T = 0.00017 3.94 (130 – 70) = 0.04 in
and requires therefore that part of the main pipe section is free to accommodate this expansion, the arm that is free to expand is:
L’B = C · De · L’ = 33 · 1.26 · 0.04 = 7.41 in
Compensation using flexible arm misalignment (Type Z)
This type of compensation avails of a misalignment of the pipe; the section of pipe (flexible arm) of length LB accommodates the expansions of the pipe of length L perpendicular to it.
The distance between the flexible arm and the brackets must not be shorter than the length of the flexible arm L.

The length of the flexible arm LB [mm] is calculated using the formula:
LB = 0.65 · C · De · L
where C is the material constant, which for Jones Stephens multilayer pipes is 33, De is the pipe diameter [in], and L is the change in length of the segment of pipe to be accommodated.

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Example: Calculate the length of the flexible arm misalignment of a PEXALGAS® pipe with a 3/4″ (26 mm) diameter and a length of 130 ft installed at a temperature of 50°F and subject to a maximum temperature of 120°F. The heat expansion of the section of pipe is:
L = L T = 0.00017 130 (120 – 50) = 1.55 in and, using the formula, the deflection arm LB is calculated:
LB = 0.65 · C · De · L = 0.65 · 33 · 1.02 · 1.55 = 26.97 in
“Omega” Expansion Bend (Type U)
This type of compensation is generally employed in risers or in basement collectors when the expansions cannot be accommodated by the changes in direction of the pipes. Whereas in the case of deflection arm compensation, changes in direction of the system are used, in this case the configuration must be created especially.

The total length of the “omega” expansion bend LB [mm] is calculated using the formula (also shown in the following diagram):

LB = 2 · l1 + l2 = C · De · L
where, C is the material constant, which, for Jones Stephens multilayer pipes is 33, De is the pipe diameter [in], L is the change in length of the pipe section to be accommodated, l1 and l2 are the sides of the “omega” expansion bend. The “omega” compensation must be configured depending on the available space; however, where possible, it is recommended to maintain the following dimensional ratio:

and therefore:

l1 = 2 l2
l1 = 0.4 LB l2 = 0.2 LB

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Example: Calculate the “omega” expansion bend for the PEXALGAS® pipe section of diameter 1″ (32 mm) and 82 ft length, installed at a temperature of 60°F and subject to a maximum temperature of 150°F. The thermal expansion of the pipe section is:
L = L T = 0.00017 82 (150 – 60) = 1.25 in
and, using the formula, the total length is calculated for the “omega” LB: LB = C · De · L = 33 · 1.26 · 1.25 = 41.49 in
and considering the dimensional ratio suggested, the result is: l1 = 0.4 LB = 0.4 41.49 = 16.6 in l2 = 0.2 LB = 0.2 41.49 = 8.3 in.

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Example: Calculate the flexible arms for the gas supply system indicated in the figure created with PEXALGAS® pipe, installed at a temperature of 50°F and subject to a maximum temperature of 140°F.
LB4

L = 10 ft
LB2
L = 20 ft

L = 10 ft

LB3

LB5

L = 2 ft
LB1 The pipe sections LB3 and LB5 are not subject to flexure due to the anchor point (F) near the cross branch. The sections subject to flexure are: LB1 which represents the flexible arm of section L1, LB2 which represents the flexible arm of L2, LB4 which represents the flexible arm of L4 = L2 + L3.

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Installation Instructions English L4

L2

L1
The extensions of the above mentioned sections are:
L1 = L1 T = 0.00017 2 (140 – 50) = 0.03 in L2 = L2 T = 0.00017 10 (140 – 50) = 0.15 in L4 = L4 T = 0.00017 20 (140 – 50) = 0.31 in which correspond to the following flexible arms:
LB1 = C · (De1 · L1) = 33 · (1.26 · 0.03) = 6.42 in LB2 = C · (De2 · L2) = 33 · (1.26 · 0.15) = 14.35 in LB4 = C · (De4 · L4) = 33 · (1.02 · 0.31) = 18.56 in

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Example: The figure shows a shaft in which a riser has been installed, subject to a thermal expansion near the branch of 20 ft.
Assess whether the change in direction made with a 1/2″ (20 mm) PEXALGAS® pipe, is sufficient to accommodate such an expansion, keeping the geometries indicated in the figure in consideration.

12 in
From the figure we can see that the available space for creating a flexible arm is L=12 in, which is the distance between the wall, through which the change in direction passes, and the riser. You need to ensure that this distance is sufficient to allow the pipe to flex without it being damaged, it is therefore necessary to calculate the actual length of the flexible arm and assess whether this is less than the available space.
At the point indicated, the expansion L = 0.25 in, the length of the actual flexible arm is therefore:
LB = C · De · L = 33 · 0.79 ·0.25 = 14.7 in > 12 in
Greater space is required to give the pipe sufficient room for movement; however, if the Jones Stephens multilayer pipe is installed with insulation where it passes through the wall, this could be capable of absorbing part of the flexure that the pipe exerts inside the wall itself. It is possible to calculate approximately the extent of the movement of the pipe inside the wall to verify whether the insulation can absorb the movement.

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Lp = L (LB- L )/LB = 0.25 2.7 / 14.7 = 0.046 in

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PROTECTION
INTRODUCTION
Jones Stephens piping shall be protected from physical damage caused by screws, nails, drill bits, etc. The piping is most susceptible to puncture at all points of support. The best practice is to install the piping in those areas where the likelihood of physical damage is minimized, and no protection is needed; for example: A. Where piping is supported at least 3 inches from any outside edge of a stud, joist, etc. or wall surface. B. Where any unsupported piping can be displaced in the direction of potential penetration at least 3 inches. C. Where piping is supported under the joist in basements or crawl spaces and is not concealed by wall board or
ceilings. When Jones Stephens piping is installed in locations where the potential of physical damage exists, the use of Striker Plates, listed for gas piping, must be used. The tubing may also be routed inside strip wound conduit or schedule 40 pipe when protection is required. In areas where penetration through studs, joists, plates, and other similar structural members occur striker protection is required when all of the following criteria apply: 1. When the piping system is installed in a concealed location and is not viewable. 2. When the piping system is installed in a location that does not allow free movement to avoid puncture threats. 3. When the piping system is installed within 3 inches of possible points of penetration.
STRIKER PLATES
Striker plates are used to prevent piping damage in areas where potential penetration threats exist through studs, joists, plates, and other similar structural members. For installations where all three above criteria apply, PEXALGAS® tubing must be adequately protected from risk of puncture or physical damage at all points of penetration through studs, joists, plates, or similar structures using 16 gauge hardened steel striker plates in accordance with the requisite state and/or local fuel gas code.

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PEXALGAS®

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A. At concealed support points and points of penetration less than 2 inches from any edge of a stud, joist, plate, etc. shielding is required at the area of support and extending 5 inches in one or both directions (if appropriate).

5 in.

Full

Support

Striker Plate

5 in.

Unrestrained Vertical

26

in.

Run

Adequate Escape Allowance
Nail, Puncture-Safe Non-Restricted Length

5 in.
< 2 in.

Support

3 in.

Half Striker Plate

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PEXALGAS®

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B. At concealed support points and points of penetration within 2 to 3 inches from any stud, joist, plate, etc., listed quarter striker plates are required at the area of support.

Floor

3″

= or <24″

Ceiling/Floor Joist

2″ to 3″

Ceiling

Quarter Striker Plate

C. Piping routed horizontally through structural members shall be protected from puncture threats with the appropriate shielding material. At penetration joints, listed stud guards of the appropriate size shall be utilized. Piping between constraints that are less than 24 inches apart and meeting the criteria requiring full striker plates, shall be additionally protected by stripwound metal-conduit, or schedule 40 pipe.

Floor

3″

24″

= or <24″

Ceiling/Floor Joist

< 2″
Ceiling

Full Striker Plate

Steel Conduit

D. Piping greater than 32 mm nominal diameter (26 mm internal diameter) installed within a concealed hollow wall cavity of 2″ x 4″ construction shall be protected along the entire concealed run length with stripwound metal conduit, or schedule 40 pipe.
E. Should an unfinished ceiling (I.e. basement) be covered at a later date, quarter striker plates should be replaced with appropriate protection devices that provide adequate protection for potential penetration threats.

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PEXALGAS®

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STRIPWOUND METAL CONDUIT
A. At termination points not covered by ANSI specifications, stripwound metal conduit (heavy wall) shall be installed as additional protection.
B. Strip wound metal conduit shall also be used to shield piping from puncture threats when the piping is installed in a concealed location where it cannot be displaced a minimum 3″ from a potential puncture threat or the distance between supports is less than 24 inches.
INSTALLATION IN INSULATED WALLS
Rigid installations present significant puncture threats for Jones Stephens PEXALGAS® in concealed spaces.
In concealed spaces, e.g. wall cavities, rigid insulation will prevent PEXALGAS® from being displaced. Jones Stephens piping shall not be installed in a wall cavity with foam insulation without additional protection as described below.
A. Piping shall be routed through an approved conduit in walls where “foamed in” insulation is to be used i.e. rigid steel pipe or conduit. Approved conduit shall be secured according to local building practice.
B. Protection methods such as pipe, conduit and strip wound hose, supply protection and give the piping space in which to move. On exterior walls the tubing may be fastened to the sheathing with cable clamps or secured with sticks/wires sprung between studs to center tubing between interior and exterior surfaces.
C. When piping is installed inside walls with batt insulation the tubing shall be routed between the face (craft paper/vapor barrier) and the wall surface. If installed in a concealed location where it cannot be displaced a minimum 3″ from a potential puncture threat the run shall be protected with stripwound conduit.
D. Jones Stephens PEXALGAS® piping does not need additional protection where it is more than three inches from any puncture threats although consideration must be given to the chance that it may migrate toward penetration threats as the insulation is applied and during curing.
FITTINGS PROTECTION
If the fittings are installed in particularly moist conditions, embedded in soil, or subject to particularly aggressive compounds (such as concrete or cement mortars) they need to be protected. In such cases, the installer shall cover the fittings with self-joining bituminous tape.

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METER-CONNECTIONS
UNSUPPORTED METERS
A. Meters which depend on the service and house piping for support shall not be directly connected to the PEXALGAS®.
B. The use of an outdoor termination fitting mounted to the exterior of the structure, meter stub out, other rigidly mounted termination fitting, or transitioning to rigid black pipe are acceptable transitional methods.
SELF SUPPORTED METERS
A. Meters which are independently supported by a bracket shall not be directly connected to the flexible gas piping. B. The use of an outdoor termination fitting mounted to the exterior of the structure, meter stub out, other rigidly
mounted termination fitting, or transitioning to rigid black pipe are acceptable transitional methods.

APPLIANCE CONNECTIONS

MOVEABLE APPLIANCES
IMPORTANT: JONES STEPHENS PIPING AND FITTINGS ARE NOT RATED AS FLEXIBLE APPLIANCE CONNECTORS AND MUST NOT BE DIRECTLY CONNECTED TO MOVABLE APPLIANCES. A. When using Jones Stephens Gas piping with moveable appliances such as a ranges or dryers, the piping must be
rigidly terminated before the appliance. Appliance stub outs, termination fittings or transitioning to rigid black pipe are acceptable means to terminate PEXALGAS® prior to the appliance.
B. Final connection from PEXALGAS® termination point to a movable appliance shall be made with a flexible appliance connector or another approved connection device.
NON-MOVEABLE APPLIANCE
A. Jones Stephens piping can be directly connected to a non-moveable appliance such as a furnace or water heater (be sure to check with local code if this is acceptable prior to installation).
B. In this type of application, no termination fitting is required, and the piping should be terminated at the appliance shut off valve.
SPECIAL APPLICATIONS
Prolonged UV exposure due to direct sunlight is detrimental to all PEXALGAS®. Jones Stephens PEXALGAS® shall not be installed exposed in direct sunlight. For outdoor installations, special care must be provided that the PEXALGAS® is not left exposed to sunlight and special care shall be made to protect the piping system from accidental damage.

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INFRARED HEATERS
Infrared heaters mounted from ceilings and walls of structures shall be connected to the Jones Stephens gas piping system ANSI 383.6 “Standard for gas fired infrared heaters”.
PAD MOUNTED GAS APPLIANCES
Gas appliances mounted on concrete pads or blocks, such as gas furnaces, air conditioners, pool heaters and NGV refueling systems, shall be connected to the Jones Stephens gas piping system at a termination fitting using either rigid pipe or an approved outdoor appliance connector. Pad mounted equipment (in most cases) is considered “fixed” if not moved for cleaning, maintenance, etc. (i.e. A/C units).
GAS FIREPLACES
Attention: Jones Stephens Gas piping shall not be routed directly into a metallic fireplace enclosure. The piping connection shall be made outside of the enclosure to a section of rigid metallic pipe. A. When routing Jones Stephens Gas piping through masonry construction, for connection to gas fireplaces and gas
logs, the piping is required to be sleeved in a nonmetallic conduit through the masonry structure. The annular space between the piping and sleeve should be caulked at both the interior and exterior locations.
B. For any fireplace application where installation of Jones Stephens Gas piping is desired, a Fireplace Stubout shall be used to terminate the piping outside the enclosure. While other listed installation practices are acceptable this method is preferred to prevent inadvertent damage, that can be caused by the fireplace enclosure, to the PEXALGAS® system.
C. Adherence to local codes and manufacturer’s instructions are required, be sure to know and understand all requirements prior to installation.
PRESSURE REGULATORS and VENT LINE INSTALLATION GUIDELINES
A Jones Stephens Gas piping system utilizing gas line pressures above ½ PSI are required to use a line pressure regulator upstream of the appliances to reduce the line pressure to less than ½ PSI. The regulator shall incorporate construction which will “lock up” under no-flow conditions to limit the downstream pressure to not more than 1/2 psi. The guidelines below highlight requirements from most Fuel Gas Codes and are for your reference only. The regulator shall comply with a nationally recognized standard for pressure regulators. Installation of the regulator must be done in accordance with the manufacturer’s instructions and local fuel gas code requirements.
Regulators used to reduce elevated system pressure for appliance use must also conform to the following:
Sized to supply the required appliance load.
Equipped with an acceptable vent limiting device, supplied by the manufacturer, or be capable of being vented to the outside atmosphere.
Installed in accordance with manufacturer’s printed instructions.
Installed in an accessible location.
A CSA Design Certified shutoff valve must be installed upstream of the pressure regulator.

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REGULATOR VENTING REQUIREMENTS
VENT LINES
Venting is required for all regulators to avoid a gas buildup in an enclosed area in the event that the regulator diaphragm ruptures. Vent lines should be properly sized per the manufacturer’s instructions and installed to ensure proper operation.
VENT LINE INSTALLATION GUIDELINES:
The vent line shall not be smaller than the vent connected to the pressure regulator.
The recommended minimum size vent line for the regulator is 1/4″ nominal ID copper tubing or other approved material. The maximum length installed for this size vent line should be less than 30 feet. Larger diameter vent lines can be used if necessary. In determining the proper size vent line for a particular installation, a test may be necessary with the vent line and regulator under normal use to ensure proper regulator operation. Consult with the regulator manufacturer for limitations of length and size of the vent line.
The vent shall be designed and installed to prevent the entry of water, insects or other foreign materials that could cause blockage.
Under no circumstances shall a regulator be vented to the appliance flue or building exhaust system.
VENT LIMITER OPTION:
Vent limiters are an alternate venting option available some regulators. When a vent limiter is desired all installation guidelines for the vent limiter and regulator must be followed to ensure proper operation of the unit.
VENT LIMITER INSTALLATION GUIDELINES:
Regulators must be installed in the horizontal upright position and in a well- ventilated area when using a vent limiter. Consult with local code before installation.
Only a vent limiter supplied by the regulator manufacturer may be used, no piping shall be installed between the regulator and vent limiting device.
Leak detection fluids may not be used on vent limiters as they can cause corrosion and operational failure. Remove the vent limiter and check the vent opening if a leaking diaphragm is suspected. Remember, regulators will “breathe” when regulating, creating a bubble – A leak will blow bubbles constantly. Do not leak test the vent limiter with liquid leak test solution. This action will contaminate the internal ball check mechanism or plug the breathing hole, resulting in erratic regulator operation.
Vent limiters shall not be used outside or anyplace where they are subject to damage from the environment. Vent protection devices shall be used in outdoor installations.

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OVER PRESSURIZATION PROTECTION
Gas systems using pressures above 2 psi up to 5 psi must use OPD (Over Pressure Protection Devices).

PRESSURE TESTING AND INSPECTION PROCEDURE
The final installation is to be inspected and tested for leaks at 1 1/2 times the maximum working pressure, but not less than 3 psi, using procedures specified in Chapter 7 “Inspection, Testing and Purging” of the National Fuel Gas Code, NFPA 54/ANSI Z223.1. In Canada, refer to the applicable sections of the CAN/CGA – B149 Installation codes.
Maximum test pressures recommended – 40 PSI MAX.
Do not connect appliances until after pressure test is completed.
Inspect the installed system to ensure: · Presence of listed stud guards and other protective devices at all required locations. · Acceptable physical condition of the tubing. · Presence of fittings (properly pressed). · Correct regulator and manifold arrangement with proper venting requirements. · All gas outlets for appliance connections should be capped during pressure testing. · Pressure testing should be performed during rough construction of the facility (before interior walls are finished).
This will permit a more complete inspection of the piping system during the pressure testing.
The elevated pressure system requires a two-part pressure test. · The first part is performed on the elevated pressure section, between the meter connection and the pressure
regulator. · The second part is performed on the low-pressure section, between the pressure regulator and the individual
gas appliance outlets.

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ELECTRICAL BONDING

Jones Stephens Gas piping system crimp fittings dielectrically isolate the metal fitting from the internal aluminum pipe layer. As such, there are no additional bonding requirements in this manual for the Jones Stephens Gas piping system in the same manner as the minimum requirements for rigid metal piping. However, installers must always adhere to any local requirements that may conflict with these instructions.

ALL OWNERS should consult a lightning safety consultant to determine whether installation of a lightning protection system would be required to achieve sufficient protection for all building components from lightning. Factors to consider include whether the area is prone to lightning.
Lightning protection systems are beyond the scope of this manual and installation guidelines, but are covered by National Fire Protection Association, NFPA 780, the Standard for the Installation of Lightning Protection Systems, and other standards.
Consult local building codes as to required separations for piping from such continuous metallic systems including metallic chimney liners, metallic appliance vents, metallic ducting and piping, and insulated or jacketed electrical wiring and cables.

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SIZING TABLES

Jones Stephens sizing tables reflect the real pressure drop of the pipe and fittings. Sizing must be done in accordance with NFPA 54 (National Fuel Gas Code), using both the TUBES and the FITTINGS sizing tables: using the pressure losses from both the PIPE and the FITTINGS sizing tables :this allows a more accurate sizing of the system for your installation.
Natural Gas <2psi

Working Conditions

Natural gas

–

Inlet Pressure

6″ WC

–

Pressure drop

0.300 WC [inch]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

97

206

370

737

67

142

254

506

54

114

204

407

46

97

175

348

41

86

155

308

37

78

140

279

31

67

120

239

28

59

107

212

25

54

97

192

23

49

89

177

22

46

83

164

20

43

78

154

19

41

73

146

15

33

59

117

13

28

50

100

12

25

45

89

11

23

40

80

10

21

37

74

9

19

35

69

8

18

32

65

8

17

31

61

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PEXALGAS®

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SIZING TABLES

Natural Gas <2psi

Working Conditions

Natural gas

–

Inlet Pressure

6-7″ WC

–

Pressure drop

0.500 WC [inch]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

128

272

488

971

88

187

335

668

71

150

269

536

60

128

231

459

54

114

204

407

48

103

185

368

41

88

158

315

37

78

140

279

33

71

127

253

31

65

117

233

29

61

109

217

27

57

102

203

25

54

97

192

20

43

78

154

17

37

66

132

15

33

59

117

14

30

53

106

13

27

49

98

12

25

46

91

11

24

43

85

11

23

40

80

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PEXALGAS®

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SIZING TABLES

Natural Gas <2psi

Working Conditions

Natural gas

–

Inlet Pressure

8″ WC

–

Pressure drop

3.000 WC [inch]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

337

717

1287 2560

232

492

884

1760

186

395

710

1413

159

338

608

1209

141

300

539

1072

128

272

488

971

109

233

418

831

97

206

370

737

88

187

335

668

81

172

309

614

75

160

287

571

71

150

269

536

67

142

254

506

54

114

204

407

46

97

175

348

41

86

155

308

37

78

140

279

34

72

129

257

31

67

120

239

30

63

113

224

28

59

107

212

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PEXALGAS®

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SIZING TABLES

Natural Gas <2psi

Working Conditions

Natural gas

–

Inlet Pressure

12-14″ WC

–

Pressure drop

6.000 WC [inch]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

490

1043

1872 3725

337

717

1287 2560

271

575

1033 2056

232

492

884

1760

205

436

784

1560

186

395

710

1413

159

338

608

1209

141

300

539

1072

128

272

488

971

118

250

449

894

109

233

418

831

103

218

392

780

97

206

370

737

78

166

297

592

67

142

254

506

59

126

226

449

54

114

204

407

49

105

188

374

46

97

175

348

43

91

164

327

41

86

155

308

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PEXALGAS®

Installation Instructions English

SIZING TABLES

Natural Gas 2psi – 1psi

Working Conditions

Natural gas

–

Inlet Pressure

2.000

[Psi]

Pressure Drop

1.000

[Psi]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

1180 811 651 557 494 448 383 340 308 283 263 247 233 187 160 142 129 118 110 103 98

2510 1725 1385 1186 1051 952 815 722 654 602 560 525 496 399 341 302 274 252 234 220 208

4506 3097 2487 2129 1887 1709 1463 1297 1175 1081 1006 943 891 716 612 543 492 453 421 395 373

8968 6164 4950 4236 3754 3402 2912 2580 2338 2151 2001 1878 1774 1424 1219 1080 979 901 838 786 742

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PEXALGAS®

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SIZING TABLES

Natural Gas 5psi – 3.5psi

Working Conditions

Natural gas

–

Inlet Pressure

5.000

[Psi]

Pressure Drop

3.500

[Psi]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Natural Gas [ft3/h]

2457 1688 1356 1160 1029 932 798 707 640 589 548 514 486 390 334 296 268 247 229 215 203

5225 3591 2884 2468 2187 1982 1696 1503 1362 1253 1166 1094 1033 830 710 629 570 525 488 458 433

9381 6448 5178 4431 3928 3559 3046 2699 2446 2250 2093 1964 1855 1490 1275 1130 1024 942 876 822 777

18670 12832 10304 8819 7816 7082 6061 5372 4867 4478 4166 3909 3692 2965 2538 2249 2038 1875 1744 1636 1546

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SIZING TABLES

LP Gas (Propane) <2psi

Working Conditions

Propane

–

Inlet Pressure

11

Pressure Drop

0.500

WC [inch] WC [inch]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Propane [ft3/h]

208

443

795

1583

143

304

547

1088

115

244

439

874

98

209

376

748

87

185

333

663

79

168

302

600

68

144

258

514

60

127

229

455

54

115

207

413

50

106

191

380

46

99

177

353

44

93

167

331

41

88

157

313

33

70

126

251

28

60

108

215

25

53

96

191

23

48

87

173

21

44

80

159

19

41

74

148

18

39

70

139

17

37

66

131

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PEXALGAS®

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SIZING TABLES

LP Gas (Propane) 2psi -1 psi

Working Conditions

Propane

–

Inlet Pressure

2.000

[Psi]

Pressure Drop

1.000

[Psi]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Propane [ft3/h]

1915 1316 1057 904 802 726 622 551 499 459 427 401 379 304 260 231 209 192 179 168 159

4072 2799 2247 1924 1705 1545 1322 1172 1062 977 909 853 805 647 553 491 444 409 380 357 337

7312 5025 4035 3454 3061 2774 2374 2104 1906 1754 1631 1531 1446 1161 994 881 798 734 683 641 605

14551 10001 8031 6873 6092 5520 4724 4187 3794 3490 3247 3046 2878 2311 1978 1753 1588 1461 1359 1275 1205

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PEXALGAS®

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SIZING TABLES

LP Gas (Propane) 5psi -3.5 psi

Working Conditions

Propane

–

Inlet Pressure

5.000

[Psi]

Pressure Drop

3.500

[Psi]

Imperial diam.
Pipe [mm] Length [ft] 5 10 15 20 25 30 40 50 60 70 80 90 100 150 200 250 300 350 400 450 500

3/8″

1/2″

3/4″

1″

16

20

26

32

Flow Rate Propane [ft3/h]

3986 2740 2200 1883 1669 1512 1294 1147 1039 956 889 835 788 633 542 480 435 400 372 349 330

8477 5826 4679 4004 3549 3216 2752 2439 2210 2033 1892 1775 1677 1346 1152 1021 925 851 792 743 702

15221 10462 8401 7190 6373 5774 4942 4380 3968 3651 3396 3187 3010 2417 2069 1834 1661 1528 1422 1334 1260

30292 20820 16719 14309 12682 11491 9835 8716 7898 7266 6759 6342 5991 4811 4117 3649 3306 3042 2830 2655 2508

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PEXALGAS®

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SIZING TABLES

FITTINGS PRESSURE LOSSES IN EQUIVALENT PIPE LENGTH (ft)

FITTING NPT Male Couplings

FLOWRATE DIRECTION

VALUE 3.28

NPT Female Couplings 3.28

Wingback Elbows 3.28
Floor/Wall Mountings 3.28

Couplings 1.03
Crimp & NPT Elbows 2.26

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PEXALGAS®

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SIZING TABLES

FITTINGS PRESSURE LOSSES IN EQUIVALENT PIPE LENGTH (ft)

FITTING Crimp & NPT tees

FLOWRATE DIRECTION

VALUE

1.64

4.51 4.92

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PEXALGAS®

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EXAMPLE NO. 1

This is a typical single-family house installation with five (5) appliances, where the design layout of gas supply piping system is arranged in series with a main run branching at the appliances. The utility company’s supply pressure (downstream of the meter) is 8″ WC, and the utility company advises that the specific gravity of the gas delivered will be 0.60 and the energy content is 1 CFH = 1,000 BTUH. The allowable pressure drop across the system has been determined to be 3.0″ WC.

Appliances list: – Gas Furnace (70,000 BTUH 70 CFH) – Water Heater (35,000 BTUH 35 CFH) – Stove (50,000 BTUH 50 CFH) – Dryer (26,000 BTUH 26 CFH) – Fireplace (24,000 BTUH 24 CFH)

Gas Furnace 70 CFH

Water Heater
35 CFH

Stove 50 CFH

Dryer 26 CFH

F=10ft

G=15ft

Meter Trunks

A=30ft

B=5ft

H=10ft C=15ft

J=5ft

D=10ft

E=5ft

Fireplace 24 CFH

TRUNKS SECTION
A
B
C
D

LOAD DELIVERED BY SECTION 205 CFH
135 CFH
100 CFH
50 CFH

SECTION LENGTH
30′
5′
15′
10′

MOST DISADVANTAGED APPLIANCE
Dryer: – run length = 65′ – run fittings: 3 straight tees, 1 tee 90° and 1 termination
wingback elbow
Dryer: – run length = 65′ – run fittings: 3 straight tees, 1 tee 90° and 1 termination
wingback elbow
Dryer: – run length = 65′ – run fittings: 3 straight tees, 1 tee 90° and 1 termination
wingback elbow
Dryer: – run length = 65′ – run fittings: 3 straight tees, 1 tee 90° and 1 termination
wingback elbow

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Appliance Sections

APPLIANCE SECTION
E F G H J

APPLIANCE LOAD
24 CFH 70 CFH 35 CFH 50 CFH 24 CFH

TOTAL SECTION LENGTH

SECTION FITTINGS

65′

4 straight tees and 1 termination wingback elbow

40′

1 tee 90° and 1 termination wingback elbow

50′

1 straight tee, 1 tee 90° and 1 termination wingback elbow

60′

2 straight tees, 1 tee 90° and 1 termination wingback elbow

65′

3 straight tees, 1 tee 90° and 1 termination wingback elbow

Run Length for Trunk Sections = Distance from meter to most disadvantaged appliance depending on the system layout and the total section length (it means not just the furthest one but the one whose section has the highest value of pressure losses).
Total section length for Appliance Sections = Distance from meter to each appliance.
Sizing Run A: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 205 CFH · most disadvantaged appliance: Dryer
run to it = 65′ additional fittings of it: 3 tees straight + 1 tee 90° + 1 termination wingback elbow
total run = 65 + 31.64 + 4.51 + 3.28 = 77.71 rounded up to 80 According to sizing table, Pipe size = 3/4in (26mm) (up to 287 CFH)
Sizing Run B: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 135 CFH · most disadvantaged appliance: Dryer
run to it = 65′ additional fittings of it: 3 tees straight + 1 tee 90° + 1 termination wingback elbow
total run = 65 + 31.64 + 4.51 + 3.28 = 77.71 rounded up to 80 According to sizing table, Pipe size = 1/2in (20mm) (up to 160 CFH)

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PEXALGAS®

Installation Instructions English

Sizing Run C: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 100 CFH · most disadvantaged appliance: Dryer
run to it = 65′ additional fittings of it: 3 tees straight + 1 tee 90° + 1 termination wingback elbow
total run = 65 + 31.64 + 4.51 + 3.28 = 77.71 rounded up to 80 According to sizing table, Pipe size = 1/2in (20mm) (up to 160 CFH)
Sizing Run D: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 50 CFH · most disadvantaged appliance: Dryer
run to it = 65′ additional fittings of it: 3 tees straight + 1 tee 90° + 1 termination wingback elbow
total run = 65 + 31.64 + 4.51 + 3.28 = 77.71 rounded up to 80 According to sizing table, Pipe size = 3/8in (16mm) (up to 75 CFH)
Sizing Run E: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 24 CFH · run to relative appliance = 65′ · additional fittings of the run: 4 tees straight + 1 termination wingback elbow
total run = 65 + 4*1.64 + 3.28 = 74.84 rounded up to 80 According to sizing table, Pipe size = 3/8 in (16mm) (up to 75 CFH)
Sizing Run F: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 70 CFH · run to relative appliance = 40′ · additional fittings of the run: 1 tee 90° + 1 termination wingback elbow
total run = 40 + 4.51 + 3.28 = 47.89 rounded up to 50 According to sizing table, Pipe size = 3/8in (16mm) (up to 97 CFH)

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PEXALGAS®

Installation Instructions English

Sizing Run G: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 35 CFH · run to relative appliance = 50′ · additional fittings of the run: 1 tee straight + 1 tee 90° + 1 termination wingback elbow

total run = 50 + 1.64 + 4.51 + 3.28 = 59.43 rounded up to 60 According to sizing table, Pipe size = 3/8in (16mm) (up to 88 CFH)

Sizing Run H: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 50 CFH · run to relative appliance = 60′ · additional fittings of the run: 2 tees straight + 1 tee 90° + 1 termination wingback elbow

total run = 60 + 2*1.64 + 4.51 + 3.28 = 71.07 rounded up to 80 According to sizing table, Pipe size = 3/8in (16mm)m (up to 75 CFH)

Sizing Run J: Utilize sizing table for natural gas at 8”WC + 3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 26 CFH · run to relative appliance = 65′ · additional fittings of the run: 3 tee straight + 1 tee 90° + 1 termination wingback elbow

total run = 65 + 3*1.64 + 4.51 + 3.28 = 77.71 rounded up to 80 According to sizing table, Pipe size = 3/8in (16mm) (up to 75 CFH)

Below are the sizes of the gas supply system:
SECTION
A B C D E F G H J

PIPE SIZE (MM) 26 20 20 16 16 16 16 16 16

PIPE SIZE (IN) 3/4 1/2 1/2 3/8 3/8 3/8 3/8 3/8 3/8

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PEXALGAS®

Installation Instructions English

EXAMPLE NO. 2
This is a typical small single-family house installation with three (3) appliances, where the design layout of gas supply piping system is arranged in series with a main run branching at the appliances. The utility company’s supply pressure (downstream of the meter) is 6″ WC, and the utility company advises that the specific gravity of the gas delivered will be 0.60 and the energy content is 1 CFH = 1.000 BTUH. The allowable pressure drop across the system has been determined to be 0.3″ WC.
Appliances list: Water Heater (36,000 BTUH 36 CFH) Stove (52,000 BTUH 52 CFH) Dryer (25,000 BTUH 25 CFH)

Water Heater
36 CFH

Stove 52 CFH

Meter

D=30ft A=20ft

E=25ft B=40ft

C=15ft

Dryer 25 CFH

Trunks TRUNKS SECTION A
B

LOAD DELIVERED SECTION

BY SECTION

LENGTH

113 CFH

20′

77 CFH

40′

MOST DISADVANTAGED APPLIANCE
Stove: – run length = 85′ – run fittings: 1 straight tee, 1 tee 90° and 1 termination wingback elbow
Stove: – run length = 85′ – run fittings: 1 straight tee, 1 tee 90° and 1 termination wingback elbow

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PEXALGAS®

Installation Instructions English

Appliance Sections

APPLIANCE SECTION
C

APPLIANCE LOAD
25 CFH

TOTAL SECTION LENGTH
75′

SECTION FITTINGS 2 tees and 1 termination wingback elbow

D

36 CFH

50′

1 tee and 1 termination wingback elbow

E

52 CFH

85′

2 tees and 1 termination wingback elbow

Run Length for Trunk Sections = Distance from meter to most disadvantaged appliance depending on the system layout and the total section length (it means not just the furthest one but the one whose section has the highest value of pressure losses)

Total section length for Appliance Sections = Distance from meter to each appliance

Sizing Run A: Utilize sizing table for natural gas at 6”WC + 0.3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 113 CFH · most disadvantaged appliance: Stove
run to it = 85′ additional fittings of it: 1 tee straight + 1 tee 90° + 1 termination wingback elbow

total run = 85 + 1.64 + 4.51 + 3.28 = 94.43 rounded up to 100 According to sizing table, Pipe size = 1in (32mm) (up to 146 CFH)

Sizing Run B: Utilize sizing table for natural gas at 6”WC + 0.3”WC pressure drop + the table of the fittings pressure losses.
· Total Load = 77 CFH · most disadvantaged appliance: Stove
run to it = 85′ additional fittings of it: 1 tee straight + 1 tee 90° + 1 termination wingback elbow

total run = 85 + 1.64 + 4.51 + 3.28 = 94.43 rounded up to 100 According to sizing table, Pipe size = 1in (32mm) (up to 146 CFH)

Sizing Run C: Utilize sizing table for natural gas at 6” WC + 0.3” WC pressure drop + the table of the fittings pressure losses.
· Total Load = 25 CFH · run to relative appliance = 75′ · additional fittings of the run: 2 tees straight + 1 termination wingback elbow

total run = 75 + 2*1.64 + 3.28 = 81.56 rounded up to 90 According to sizing table, Pipe size = 1/2in (20mm (up to 43 CFH)

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PEXALGAS®

Installation Instructions English

Sizing Run D: Utilize sizing table for natural gas at 6” WC + 0.3” WC pressure drop + the table of the fittings pressure losses.
· Total Load = 36 CFH · run to relative appliance = 50′ · additional fittings of the run: 1 tee 90° + 1 termination wingback elbow

total run = 50 + 4.51 + 3.28 = 57.79 rounded up to 60 According to sizing table, Pipe size = 1/2in (20mm (up to 54 CFH)

Sizing Run E: Utilize sizing table for natural gas at 6” WC + 0.3” WC pressure drop + the table of the fittings pressure losses.
· Total Load = 52 CFH · run to relative appliance = 85′ · additional fittings of the run: 1 tee straight + 1 tee 90° + 1 termination wingback elbow

total run = 85 + 1.64 + 4.51 + 3.28 = 94.43 rounded up to 100 According to sizing table, Pipe size = 3/4in (26mm) (up to 73 CFH)

Below are the sizes of the gas supply system:
SECTION A B C D E

PIPE SIZE (MM) 32 32 20 20 26

PIPE SIZE (IN)
1 1 1/2 1/2 3/4

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PEXALGAS®

Instrucciones de instalación Español