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Watts LF25AUB-Z3 1 1/4 1 1/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Ss Seat, Adjustable 25-75 psi
Model: WAT-LF25AUB-Z3 1 1/4
1 1/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Ss Seat, Adjustable 25-75 psiLF25AUB-Z3 1 1/4 - spec sheet
Watts
$960.49
1 1/4 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Adjust 25-75 psi
LFU5B-Z3 1 1/4 - spec sheet
LFU5B-Z3 1 1/4 - spec sheet
Manufacturer Resources
Product Specs
- Adjustable Reduced Pressure Range:
- 25 to 75
- Adjustable Reduced Pressure Range Bar:
- 1.8 to 5.2
- Body Material:
- Lead Free Copper Silicon Alloy
- Buy American Act Compliant:
- USA
- Corrosion Resistant Coating:
- Yes
- Disc Material:
- EPDM
- Ean:
- 98268328462
- Inlet Connection Size:
- 1 1/4 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:
- 1 1/4 IN
- Outlet Connection Type:
- Female Threaded
- Outlet Thread Type:
- NPT
- Part Number:
- 9180
- Series:
- LFU5B-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 LFU5B-Z3 1 1/4 – Frequently Asked Questions
1) What pipe size and connections does the Watts LFU5B-Z3 pressure reducing valve use?
It's a 1-1/4 inch valve with 1-1/4 inch NPT female threaded connections on both the inlet and the outlet. The inlet side is a union connection, so you can break the valve out of the line for service without cutting pipe. On 1-1/4 inch steel or brass thread, it makes up directly; on copper or PEX you'll need female-NPT adapters at both ends.
2) Do I still need a separate thermal expansion tank with this valve?
The LFU5B-Z3 has a built-in thermal expansion bypass, which relieves back toward the supply when downstream pressure from water heater expansion exceeds inlet pressure. That handles the closed-system problem a plain reducing valve creates. Whether your jurisdiction still requires an expansion tank on the water heater is a local code call, but the bypass is part of this valve.
3) Is the Watts LFU5B-Z3 approved for potable drinking water?
It's a lead free valve, bodied in lead free copper silicon alloy with an EPDM disc and stainless trim, so it's built for potable water service rather than for a mechanical or irrigation-only line.
4) What's the maximum inlet pressure on this Watts reducing valve?
300 psi (20.7 bar) maximum working pressure, so it handles high municipal mains and booster-fed risers without an upstream limiter.
5) Can I use the LFU5B-Z3 on a hot water line?
Its temperature rating runs from 33 F up to 160 F (0.5 C minimum), which covers domestic hot water at typical storage temperatures as well as cold service. Keep it out of any line that can see steam or a boiler-side temperature above 160 F, and don't install it where the pipe can freeze.
6) Does this Watts PRV have a strainer built in, or do I need to pipe one upstream?
A stainless steel strainer is integral to the valve, so you don't have to add a separate Y-strainer ahead of it. Stainless trim and a stainless screen also mean less scale fouling than a plated-steel screen on a hard-water service. Leave clearance at the valve to pull the screen for cleaning.
7) Is this valve Buy American compliant for a government or institutional job?
The LFU5B-Z3 is listed as Buy American Act compliant, USA origin, which is what a federal, school district, or municipal spec typically wants documented on a domestic water PRV.
8) What exact Watts part number should I order for the 1-1/4 inch union PRV?
Order it as Watts LFU5B-Z3 1-1/4, series LFU5B-Z3, factory part number 9180. That's the 1-1/4 inch NPT female union by NPT female configuration set at 50 psi.
9) Does the LFU5B-Z3 come with a pressure gauge?
No gauge is supplied with it. If you want to verify the downstream setting while you adjust it, plan on a separate gauge on the outlet piping or a hose-bibb gauge at a nearby fixture.
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts LFU5B-Z3 1 1/4 come with a warranty?
Absolutely. The Watts LFU5B-Z3 1 1/4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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