Watts LF25AUB-Z3 User Manual

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Watts LF25AUB-Z3 User Manual

 

 

ES-LF25AUB

 

 

 

For Residential and Commercial Applications

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LEAD FREE*

Series LF25AUB-Z3

Water Pressure Reducing Valves**

Sizes: 12" – 2" (15 – 50mm)

Series LF25AUB-Z3 Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series is suitable for water supply pressures up to 300psi (20.7 bar) and may be adjusted from 25 – 75psi (172 – 517 kPa). The LF25AUB-Z3 features Lead Free* construction to comply with Lead Free* installation requirements. The standard setting is 50psi (345 kPa). All parts are quickly and easily serviceable without removing the valve from the line. The standard bypass feature permits the flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main supply.

Features

•  Standard  construction includes Z3 sealed spring cage and stainless steel corrosion resistant adjusting & cage screws for accessible outdoor

or pit installations

•  Union inlet connection

•  Integral stainless steel strainer •  Replaceable seat module

•  Lead Free* cast copper silicon alloy construction •  Serviceable in line

•  Bypass feature controls thermal expansion pressure***

•  High temperature resistant reinforced diaphragm for hot water

Models

LF25AUB-Z3

LF25AUB-S-Z3

LF25AUB-DU-Z3

LF25AUB-S-DU-Z3

LF25AUB-DU-THDxPEX-Z3

LF25AUB-DU-LF-Z3 LF25AUB-QC-Z3 LF25AUB-DU-QC-Z3

NPT threaded female union inlet x NPT female outlet Solder union inlet x NPT female outlet

Double Union – NPT threaded union female inlet and outlet Double Union – Solder union inlet and outlet

Double Union – NPT threaded female inlet and PEX union outlet

Double union body less fittings (3/4", 1", 11/4")

Single Union – Quick-Connect union inlet (1/2", 3/4", 1")

Double Union – Quick-Connect inlet and outlet (1/2", 3/4", 1")

LF25AUB-Z3

Bypass valve assembly for 114" – 2" (32 – 50mm) sizes

Union inlet connection

Integral stainless steel strainer

EPDM diaphragm

Bypass for 12" – 1"

(15 – 25mm) sizes

Replaceable seat module

Specifications

A Water Pressure Reducing Valve with integral strainer shall be installed in the water service pipe near its entrance to the building where supply main pressure exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower. The water pressure reducing valve shall be constructed using Lead Free* materials. Lead Free* regulators shall comply with state codes and standards, where applicable, requiring reduced lead content. The valve shall feature a Lead Free* cast copper silicon alloy suitable for water supply pressures up to 300psi (20.7 bar). Provision shall be made to permit the bypass flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main supply. Water Pressure Reducing Valve with built-in bypass check valves will be acceptable. Approved valve shall be listed to ASSE 1003 and IAPMO and certified to

CSA B356. Valve shall be a Watts Series LF25AUB-Z3.

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

**A water saving test program concluded that reducing the supply pressure from 80-50psi (551-345 kPa) resulted in a water savings of 30%.

***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).

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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