Watts LFU5B-Z3 1 1 In Lead Free Water Pressure Reducing Valve, Npt Female Union X Npt Female, Adjust 25-75 psi

It's a 1 inch valve, female NPT threaded on both the inlet and the outlet. The inlet side is a union connection, so you can break the valve out for service without cutting the line. Both ends take standard 1 inch NPT male threads, so a threaded nipple or a male adapter off copper or PEX lands straight on it.

Adjustable range is 25 to 75 psi (1.8 to 5.2 bar), and it leaves the factory at 50 psi (3.4 bar). For most residential and light commercial service that 50 psi setting is usable as-is. If you're feeding a tall building or long horizontal runs and need to make up friction loss, you can bring it up toward 75. If downstream fixtures are rated low, dial it down.

Yes. The body is a lead free copper silicon alloy and the valve is flagged lead free, which is what you need on potable domestic water service. Trim and the strainer screen are stainless steel, and the seat disc is EPDM.

The LFU5B-Z3 has a built in thermal expansion bypass. When a closed system heats up and downstream pressure climbs above the inlet pressure, the bypass lets that excess back through toward the main instead of trapping it against the valve. That does not substitute for a properly sized thermal expansion tank on a heater, but it keeps the PRV itself from becoming a hard dead end on small expansion events.

If the existing valve is 1 inch female NPT on both ends, yes, the LFU5B-Z3 threads in the same way, and the union on the inlet makes the swap and any future service easier than a valve threaded solid at both ends. Two things to check before you buy: your required setting has to fall inside 25 to 75 psi, and if the old valve was a leaded bronze body, the lead free copper silicon body here is what current potable water rules expect on the replacement.

A stainless steel strainer is integral to the valve, so you don't need to pipe a separate Y strainer upstream. That matters on well water or on a municipal main that's been disturbed by repair work, since grit on the seat is the usual reason a PRV starts creeping. Leave service clearance to pull and rinse the screen.

No gauge is supplied with the LFU5B-Z3. Plan on a separate gauge downstream, or a hose bibb gauge at a laundry or sillcock, to verify the setting when you adjust it. Without one you're setting blind.

Maximum working pressure is 300 psi (20.7 bar), and it's rated to 160 degrees F, with a minimum of 33 degrees F (0.5 C). That 300 psi inlet rating covers high pressure city mains and booster discharge. The 160 degree ceiling means this is a cold or domestic water valve, not something to drop into a hot heating loop.

Yes, it's flagged Buy American Act compliant with USA origin, which is what a public agency, school district, or federally funded job typically needs on the submittal. Watts part number for this 1 inch valve is 9154, model LFU5B-Z3 1.

The valve carries a corrosion resistant coating over the lead free copper silicon body, and the internal trim and strainer screen are stainless steel rather than plated steel. That combination is aimed at wet mechanical rooms and aggressive water where plated parts scale and seize.