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Brass water pressure reducing valve with FNPT connections

Watts

Watts LFU5B-LP-Z3 Water Pressure Reducing Valve 30 psi

SKU CH-EMJ7-RS7QD

Lead-free brass valve reduces incoming water pressure to a 30 psi preset with a 10–35 psi adjustment range

  • TypeOther
  • Lead-free brass construction keeps drinking water safe
  • Factory preset to 30 psi for immediate installation
  • Adjustable from 10 to 35 psi to match system needs
  • Rated for 180 °F and 300 psi for demanding hot-water lines
  • Certified to ASSE 1003 and CSA B356 standards

30 psi Lead-Free Brass Pressure Reducing Valve

The Watts LFU5B-LP-Z3 is a water pressure reducing valve preset to 30 psi with an adjustment range of 10 to 35 psi. It is constructed from lead-free brass and features 3/4 inch FNPT connections on both ends. The valve meets ASSE 1003, CSA B356 and IAPMO standards for potable water systems.

Threaded FNPT Installation Without Integrated

The valve installs directly into 3/4 inch FNPT piping using standard thread sealant or tape. No strainer is included, so debris in the supply line can reach the valve seat and affect regulation. Installing an upstream sediment filter is recommended to protect the internal components.

Verify Supply Pressure

Confirm that the incoming supply pressure does not exceed the 300 psi maximum rating and that water temperature stays below 180 degrees Fahrenheit. The preset 30 psi outlet suits low-pressure applications only; systems requiring higher delivery pressure will need a different valve setting.

Highlights

  • Lead-free brass construction keeps drinking water safe
  • Factory preset to 30 psi for immediate installation
  • Adjustable from 10 to 35 psi to match system needs
  • Rated for 180 °F and 300 psi for demanding hot-water lines
  • Certified to ASSE 1003 and CSA B356 standards

Specifications

BrandWATTS
TypeOther

Questions about this item

How can I confirm the valve is reducing pressure to the 30 psi preset after installation?

Use a downstream pressure gauge on a flowing fixture; the reading should settle near the 30 psi factory preset and stay within the 10 to 35 psi adjustment range.

What comes with the LFU5B-LP-Z3 and what must I supply for a 3/4 in. FNPT installation?

The valve body is supplied with integral FNPT x FNPT threads; you must provide 3/4 in. pipe fittings, thread sealant and a pressure gauge for verification.

Which pressure setting should I choose if my system needs a fixed 30 psi reduction?

This model is factory preset to 30 psi and adjustable from 10 to 35 psi, so it covers a fixed 30 psi requirement without needing a different version.

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