Watts LF25AUB-Z3 3/4 3/4 In Le...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$369.18
Watts LF25AUB-Z3 3/4 3/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Polymer Seat, Adjustable 25-75 psi

Watts LF25AUB-Z3 3/4 3/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Polymer Seat, Adjustable 25-75 psi

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Model: LF25AUB-Z3 3/4
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$369.18
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3/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Polymer Seat, Adjustable 25-75 psi

LF25AUB-Z3 3/4 - spec sheet

Manufacturer Resources

Product Specs

Adjustable Reduced Pressure Range:
25 to 75
Adjustable Reduced Pressure Range Bar:
1.7 to 5.2
Body Material:
Lead Free Cast Copper Silicon Alloy
Buy American Act Compliant:
USA
Corrosion Resistant Coating:
Yes
Disc Material:
EPDM
Ean:
98268329704
Inlet Connection Size:
3/4 IN
Inlet Connection Type:
Female Threaded
Inlet Thread Type:
NPT
Lead Free:
Yes
Maximum Operating Temperature Fahrenheit:
160
Maximum Working Pressure Bar:
20.7
Maximum Working Pressure Psi:
300
Minimum Temperature Celsius:
0.5
Minimum Temperature Fahrenheit:
33
Outlet Connection Size:
3/4 IN
Outlet Connection Type:
Female Threaded
Outlet Thread Type:
NPT
Part Number:
9257
Series:
LF25AUB-Z3
Standard Reduced Pressure Setting Bar:
3.4
Standard Reduced Pressure Setting Psi:
50
Strainer:
Yes
Strainer Material:
Stainless Steel
Thermal Expansion Bypass:
Yes
Trim Material:
Engineered Composite
Valve Style:
Standard
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Valves
Product Type:
General Valve
Brand Name:
Watts
Gauge:
No Gauge

Watts LF25AUB-Z3 3/4 – Frequently Asked Questions

1) What pipe size and connection does the Watts LF25AUB-Z3 pressure reducing valve use?
It's a 3/4 inch valve, female NPT threaded on both the inlet and outlet. The inlet side is a union connection, so you can break the valve out for service without cutting the line. For copper or PEX you'll need matching 3/4 inch male NPT adapters on each side.
2) Is the Watts LF25AUB-Z3 lead free and legal for potable drinking water lines?
Yes. The body is a lead free cast copper silicon alloy and the valve is flagged lead free, which is what you need on potable supply piping. It's also Buy American Act compliant, USA origin, which matters on federal and institutional jobs.
3) Will this Watts PRV relieve thermal expansion from a water heater, or do I still need an expansion tank?
The LF25AUB-Z3 has a built-in thermal expansion bypass, which lets expansion pressure vent back to the street instead of building against a closed valve. The Z3 suffix is the bypass version. It's still common practice to install an expansion tank on a heater, but the bypass is what separates this from a plain PRV that would make the system closed.
4) Does the Watts LF25AUB-Z3 have a strainer built in, or do I need a separate one upstream?
A stainless steel strainer is integral to the valve, so you don't need a separate wye strainer ahead of it. Give yourself clearance at the strainer cap for periodic cleaning, which is the usual cause of a PRV that stops holding its setting on a well or older municipal line.
5) Does this Watts pressure reducing valve come with a pressure gauge?
No gauge is supplied with the LF25AUB-Z3. To set the reduced pressure you'll need a gauge on the downstream side, either a hose bib test gauge or a permanently piped gauge in a tee after the valve.
6) Can I use this Watts PRV on a hot water line?
Maximum operating temperature is 160 F, with a minimum of 33 F (0.5 C), so it will handle a domestic hot water line within that range. Keep it out of any location that can freeze; 33 F is the floor.
7) What is the exact Watts part number to order for the 3/4 inch union PRV with expansion bypass?
Order LF25AUB-Z3 3/4, Watts part number 9257. The AUB designates the union ball valve style inlet connection and the Z3 the 25 to 75 psi adjustable range with thermal expansion bypass.
8) What are the seat and internal parts made of on the Watts LF25AUB-Z3?
Polymer seat with an EPDM disc and engineered composite trim, in a lead free cast copper silicon alloy body with a corrosion resistant coating. The composite trim is the reason this one tolerates aggressive or hard water better than an all-brass trim valve.
How fast can I get the Watts LF25AUB-Z3 3/4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts LF25AUB-Z3 3/4 come with a warranty?
Absolutely. The Watts LF25AUB-Z3 3/4 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Watts LF25AUB-Z3 3/4?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Watts LF25AUB-Z3 3/4 from ZenSupply?
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