WATTS LF25AUB-Z3 Series Water Pressure Reducing Valve Installation Guide

WATTS LF25AUB-Z3 Series Water Pressure Reducing Valve

WARNING

• Read this Manual BEFORE using this equipment.
• Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment.
• Keep this Manual for future reference.

WARNING

You are required to consult the local building and plumbing codes prior to installation. If the information in this manual is not consistent with local building or plumbing codes, the local codes should be followed. Inquire with governing authorities for additional local requirements.

Product Installation Instructions

1. The valve should be installed by a licensed contractor in accordance with local codes and ordinances.
2. This valve should be installed where it is accessible with sufficient clearance for cleaning, service, or adjustment.
3. Before installing the valve, be sure that the pipe ends are reamed and threads are cut to size. For valves with Quick-Connect tail- pieces refer to “Quick-Connect Installation” instructions below.
4. Flush the lines to remove all loose scale, dirt and other foreign matter that can damage or clog the valve.
5. Install the regulator with the arrow on the body pointing in the direction of the flow.
6. Regulator may be installed vertically or horizontally (upright or inverted).
7. Start Up – Open cold water supply then hot water supply. Inspect for leaks.

NOTICE: To tighten valve, first hand tighten followed by ¼-1 turn, using wrench. Product is for interior or exterior applications. Product should not be buried directly in the ground. For exterior applications where the valve will be situated in a vault or pit or be in contact with the ground, the valve should be installed in a meter box/vault, accessible for repair and adjustment, per local code.

WARNING

Need for Periodic Inspection/Maintenance: This product must be tested periodically in compliance with local codes, but at least once per year or more as service conditions warrant.

Corrosive water conditions, and/or unauthorized adjustments or repair could render the product ineffective for the service intended. Regular checking and cleaning of the product’s internal components helps assure maximum life and proper product function. Maintenance may be required when the water downstream of the product exhibits one or more of the following: excessive water pressure, insufficient water pressure or flow, or inconsistent water pressure.

Maintenance Instructions

WARNING: Depressurize valve before servicing.

• To clean strainer; shut off inlet water pressure, remove strainer plug (2), remove and clean strainer.
• To replace seat disc; shut off supply, loosen nut (51) and back off adjusting screw (53) remove spring cage (3), spring (52) and washer (62). Remove bottom plug (12) and gasket (101). Insert and hold screw driver in slot on top of stem while loosening seat disc holder (47) from bottom of stem (2).
• To replace diaphragm; loosen lock nut (48) and remove lock washer (46), diaphragm plate (60) and diaphragm (20).
• When reassembling apply a drop of low strength thread lock to disc holder.
• Open inlet water supply slowly.

Adjustment

• Regulator is factory preset to 50psi (344 kPa) in a static condition.
• To adjust pressure setting, loosen the lock nut and turn the adjusting bolt clockwise to increase pressure, counterclockwise to decrease pressure.

CAUTION

• Any time a reducing valve is adjusted, use a pressure gauge to verify correct pressure setting.
• Do not bottom out the adjusting screw on spring cage.

Bypass Feature

• This regulator has a built-in thermal expan-sion bypass feature.
• This feature prevents downstream pressure from rising to more than 10psi above the supply pressure.

NOTICE

• The bypass feature will not prevent the pressure relief valve from opening on the hot water supply system with pressure above 150psi (10.3 bar).

Repair Kits

Kit for Series LF25AUB-Z3 includes all items shown above

When Ordering, Specify:

1. Ordering Code
2. Size of Valve
3. Type Number
4. Model shown on Nameplate

Typical, Series And Parallel Installation

Typical Installation

Series Installation

• Series installations are recommended where very high supply pressure must be reduced to a very low downstream pressure.
• Reducing the pressure in stages eliminates whistling and noise.

Parallel Installation

• Parallel installations are recommended where high flow or low flow demand is intermittent/occasional.
• They are also used for installations where service cannot be interrupted.

WARNING

• For valves with CPVC or PEX end connections, do not exceed the tubing manufacturers pressure and temperature ratings.
• Refer to the tubing manufacturers product specifications for that information.

Quick-Connect Installation

To Connect

1. Mark pipe as shown.
   • This is pipe insertion depth.
2. Clean pipe end
3. If using PEX tubing, insert pipe stiffener (provided) into end of pipe.
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.

To Disconnect

1. Remove collet clip.
2. Depress collet.
3. Pull tubing from tailpiece.

Troubleshooting

High System Pressure

• If the downstream system pressure is higher than the set pressure under no flow conditions, the cause could be thermal expansion, pressure creep or dirt/debris on the seat.
• Thermal expansion occurs whenever water is heated in a closed system. The system is closed when supply pressure exceeds 150psi, or a check valve or backflow preventer is installed in the supply piping.
• You must make provisions for pressure relief protection of your plumbing system and components. The use of a relief valve such as the Watts 530C, BRV, Governor 80, or 3L or potable water expansion tank such as the Watts DET, PLT or DETA may be required.
• To determine if this is the result of thermal expansion, try briefly opening the cold water tap. If the increased pressure is caused by thermal expansion, the pressure will immediately be relieved and the system will return to the set pressure. Watts offers a pressure test gauge, model 276H300 to assist you in determining if you have high water pressure.
• The 276H300 when attached to a hose bibb registers the highest pressure reading over the period of time it is left on the system.

Limited Warranty

Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations maynot apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

Contacts

• USA:
  • T: 978-689-6066
  • F: 978-975-8350
  • Watts.com
• Canada:
  • T: 888-208-8927
  • F: 905-332-7068
  • Watts.ca
• Latin America:
  • T: (52) 55-4122-0138
  • Watts.com

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