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Brass pressure reducing valve with union connections, half inch size

Watts

Watts 1/2 LF U5BZ3 Pressure Reducing Valve 1/2 In. 25-75 psi

SKU CH-ZPEK-1EQQ6 MPN 1/2

Reduces incoming water pressure to a preset 50 psi within a 25 to 75 psi range using lead-free brass construction

  • TypeDrain Components
  • Reduces water pressure to safe levels with a 25-75 psi adjustment range
  • Factory preset at 50 psi for immediate installation without manual tuning
  • Lead-free brass construction meets ASSE 1003 and CSA B356 drinking-water standards
  • Integrated strainer protects downstream fixtures from debris and sediment
  • Handles up to 300 psi inlet pressure and 160°F water temperature

Pressure Reducing Valve for Residential Plumbing

The Watts LF U5BZ3 is a lead-free brass pressure reducing valve designed for 1/2 inch piping in potable water systems. It lowers incoming supply pressure to a safer level for household fixtures and appliances. The valve includes an integral strainer and uses FNPT union connections for straightforward installation. Factory preset is 50 psi with an adjustable range of 25 to 75 psi.

Suitable for Standard Residential Supply Lines

This valve fits 1/2 inch FNPT connections and handles a maximum inlet pressure of 300 psi and temperatures up to 160 degrees F. It meets ASSE 1003, ANSI A112.26.2, CSA B356 and IAPMO standards for code compliance. Installers needing a larger pipe size or a different adjustment range should select another model. Systems requiring pressure settings above 75 psi are outside this valve's capability.

Adjustable Outlet Pressure Range 25 to 75 psi

The single specification that determines suitability is the outlet pressure adjustment range of 25 to 75 psi. The valve arrives preset at 50 psi and can be field-adjusted within this window to match the specific requirements of the plumbing system. If the installation demands a preset or maximum pressure outside this interval, a different reducing valve must be used.

Highlights

  • Reduces water pressure to safe levels with a 25-75 psi adjustment range
  • Factory preset at 50 psi for immediate installation without manual tuning
  • Lead-free brass construction meets ASSE 1003 and CSA B356 drinking-water standards
  • Integrated strainer protects downstream fixtures from debris and sediment
  • Handles up to 300 psi inlet pressure and 160°F water temperature

Specifications

TypeDrain Components
BrandWatts
Model1/2 LF U5BZ3

Questions about this item

How do I install the 1/2 In. FNPT union connections and what step is often missed?

Thread the union nuts onto the FNPT ends with pipe sealant, tighten to a firm seat, then set the adjustment bolt to the desired pressure between 25 and 75 psi; the step often missed is flushing the line before final tightening so debris does not clog the built-in strainer.

What maintenance will the lead-free brass body and strainer need over time?

Inspect the strainer screen annually and clean out any sediment; the brass body resists corrosion up to 160 Degrees F and 300 psi, so no replacement is needed unless physical damage occurs.

At what pressure will the valve stop regulating during sustained high-demand flow?

The adjustment range tops out at 75 psi; if inlet pressure pushes the valve beyond that setting, the internal spring reaches its limit and the outlet pressure will rise above the set point.

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