Watts LF25AUB-Z3 1 1/2 1 1/2 I...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,536.87
Watts LF25AUB-Z3 1 1/2 1 1/2 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Ss Seat, Adjustable 25-75 psi

Watts LF25AUB-Z3 1 1/2 1 1/2 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Ss Seat, Adjustable 25-75 psi

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Model: LF25AUB-Z3 1 1/2
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,536.87
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1 1/2 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Ss Seat, Adjustable 25-75 psi

LF25AUB-Z3 1 1/2 - 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:
98268331868
Inlet Connection Size:
1 1/2 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:
1 1/2 IN
Outlet Connection Type:
Female Threaded
Outlet Thread Type:
NPT
Part Number:
9431
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:
Stainless Steel
Valve Style:
Standard
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Valves
Product Type:
General Valve
Brand Name:
Watts
Gauge:
No Gauge

Watts LF25AUB-Z3 1 1/2 – Frequently Asked Questions

1) What pipe connections does the Watts LF25AUB-Z3 1-1/2 inch pressure reducing valve have?
Both ends are 1-1/2 inch NPT female threaded, inlet and outlet, with the inlet side being a union connection. That means you thread onto standard 1-1/2 inch NPT male adapters on both sides, and the union lets you break the valve out for service without cutting the line. If your run is copper, you'll need male adapters to land on the threads.
2) Is the Watts LF25AUB-Z3 lead free for potable water?
Yes. The body is a lead free cast copper silicon alloy, the trim and seat are stainless steel, and the valve is flagged lead free, so it's built for potable water service.
3) Does this Watts pressure reducing valve handle thermal expansion from a water heater?
It has a thermal expansion bypass built in, so expansion pressure from a heated tank can bleed back toward the supply instead of being trapped on the house side. That's the -Z3 feature. It does not replace a properly sized expansion tank where your code or the heater manufacturer requires one.
4) Does the LF25AUB-Z3 include a strainer, or do I need a separate one upstream?
An integral stainless steel strainer is part of the valve, so you don't need to pipe a separate Y-strainer ahead of it on a normal potable supply. On dirty or new construction lines, plan for access to pull and rinse that screen.
5) Does this Watts PRV come with a pressure gauge?
No gauge is supplied with the LF25AUB-Z3. If you want to verify the downstream setting while you adjust it, tee in a gauge on the outlet side or use a hose bibb gauge at a fixture.
6) What are the temperature and inlet pressure limits on this 1-1/2 inch Watts reducing valve?
Maximum working pressure is 300 psi (20.7 bar) and maximum operating temperature is 160 F, with a minimum of 33 F (0.5 C), so it must stay out of freezing conditions. The 160 F ceiling means cold potable supply or tempered lines, not hot water heating loops running above that.
7) Is the Watts LF25AUB-Z3 acceptable for a federal or Buy American job?
It's flagged Buy American Act compliant with USA origin, which is what a government, military or federally funded institutional spec normally asks for on domestic water valves.
8) What exact Watts part number should I order for the 1-1/2 inch union PRV?
Order Watts series LF25AUB-Z3 in 1-1/2 inch, manufacturer part LF25AUB-Z3 1 1/2. The AUB designation is the union inlet version; the Z3 designates the thermal expansion bypass and the 25 to 75 psi adjustment range.
9) What seals the LF25AUB-Z3, and will it hold up in a building with aggressive water?
Sealing disc is EPDM against a stainless steel seat, with stainless trim and a corrosion resistant coating on the valve. EPDM is the standard elastomer for potable cold water and chloraminated municipal supply. For a property manager standardizing across a portfolio, that combination is the usual long-service spec on a domestic PRV.
How fast can I get the Watts LF25AUB-Z3 1 1/2 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 1 1/2 come with a warranty?
Absolutely. The Watts LF25AUB-Z3 1 1/2 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 1 1/2?
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 1 1/2 from ZenSupply?
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