NATIONAL FIRE PRODUCTS NFP 21-31 Specflex Sh Sprinkler Drops Instructions

NATIONAL FIRE PRODUCTS NFP 21-31 Specflex Sh Sprinkler Drops

Product Information

Specifications

• Product Name: SpecflexTM SH Sprinkler Drops
• Figure Number: 21
• Model Number: NFP21XXX
• Standards: NFP21XXX
• Maximum Length: 6ft
• Outer Diameter: 1.10 (28mm)

Features

• Braided flexible hose design
• Includes tube, isolation ring, sealing gasket, nut, nipple, reducer, braid, press ring (inner), and press ring (outer)
• Approved bracket assembly: NFP240124, NFP240724, NFP240624, NFP240148, NFP2403, NFP240424

Technical Data

• K-Factor: 5.6 (for outlet size 1/2), 8.0 (for outlet size 3/4)
• Equivalent Length of 1 Schedule 40 Pipe: UL – 27.0ft to 90.5ft, FM – 33.1ft to 72.5ft

Installation

1. Ensure the length of the sprinkler drop does not exceed 6ft.
2. Do not bend the sprinkler drop within 2.5 inches from the connection nuts.

Outlet Connection Options

• 1/2 outlet connection
• 3/4 outlet connection

Ordering Code Matrix

Product Usage Instructions

Step 1: Installation

To install the SpecflexTM SH Sprinkler Drops, follow these steps:

1. Ensure the length of the sprinkler drop does not exceed 6ft.
2. Choose the appropriate outlet connection size (1/2 or 3/4).
3. Attach the sprinkler drop to the outlet using the provided nut and nipple.
4. If needed, use a reducer to connect the sprinkler drop to a different pipe size.
5. Secure the sprinkler drop using the approved bracket assembly (NFP240124, NFP240724, NFP240624, NFP240148, NFP2403, NFP240424).

Step 2: Positioning

Position the sprinkler drop in the desired location, ensuring it is properly aligned with the target area to be covered by the sprinkler system.

Step 3: Testing

Once the sprinkler drop is installed and positioned, test the system to ensure proper water flow and coverage. Adjust the water pressure if necessary.

Step 4: Maintenance

Regularly inspect the sprinkler drop for any signs of damage or leaks. Replace any damaged components and tighten any loose connections as needed.

FAQ

• Q: What is the maximum length of the SpecflexTM SH Sprinkler Drops?
• A: The maximum length is 6ft.
• Q: Can I bend the sprinkler drops near the connection nuts?
• A: No, avoid bending the sprinkler drops within 2.5 inches from the connection nuts.
• Q: What are the available outlet connection sizes?
• A: The available outlet connection sizes are 1/2 and 3/4.

Standards

National Fire Protection Association (NFPA)

• NFPA 13: Standard for the installation of sprinkler systems
• NFPA 13D: Standard for the installation of sprinkler systems in one- and two-family dwellings and manufactured homes
• NFPA 13R: Standard for installation of sprinkler systems in residential occupancies up to and including four stories in height
• NFPA 13 Section 9.2.1.3.3.3: No hangers are required for flexible connections as long as the length does not exceed 6ft

American Society for Testing and Methods (ASTM)

• ASTM C635: Standard specifications for the manufacture, performance and testing of metal suspension systems for acoustical tile and lay-in panel ceilings
• ASTM C636: Standard practice for installation of metal ceiling suspension systems for acoustical tile and lay-in panels

Factory Mutual (FM), FM Class No, 1637

• Approved standard for flexible sprinkler hose with threaded end fittings

Underwriter’s Laboratories, Inc. (UL), UL 2443

• Standard for flexible sprinkler hose with fittings for fire protection service

International Building Code (IBC) Section 1621/American Society of Civil Engineers (ASCE) 7 9.6.2.6.2 & 9.6.2.6.2.2

•  Flexible sprinkler connections are the alternative solution to install without seismic escutcheons (oops ring)

Features

• Available lengths: 31″, 36″, 48″, 60″ and 72″*
• Outlet sizes: 1/2″ and 3/4″
• Includes pre-installation positioning and identification sleeve
• Max ambient temperature rating: 225° F (UL/FM)
• Max working pressure rating: 175 psi (UL/FM)
• Minimum bend radius**: UL – 4″ / FM – 8″
• Connection: Inlet – 1″ MNPT
• Hose Diameter: I.D. = 0.85″ (21.5mm) O.D. = 1.10″ (28mm

technical data

• Hose type: Braided
• Hose: Stainless steel 304
• Nut and nipple: Zinc-plated steel
• Sealing gasket: EPDM
• Press ring (inner and outer): Stainless steel 304
• Isolation ring: Nylon

Installation

• Please refer to NFP Specflex Installation Manuals for proper installation guidelines
• 31″ and 72″ currently only available with 1/2″ outlet
• DO NOT bend within 2.5″ from connection nuts.

SH hose Bracket Approvals

BRAIDED FLEXIBLE HOSE

1. Tube
2. Isolation ring
3. Sealing gasket
4. Nut
5. Nipple (1″)
6. Reducer
7. Braid
8. Press ring (inner)
9. Press ring (outer)

Friction Loss Data

• UL: 4″ minimum bend radius, where C=120
• FM: 8″ minimum bend radius, where C=120

Ordering Code Matrix

ferguson.com/nfp

References

• National Fire Products

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