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Brass pressure reducing valve with strainer, 1 inch FNPT connections

Watts

Watts LF25AUB-HP-Z3 Pressure Reducing Valve 85 psi 1 inch FNPT

SKU CH-R00E-EY2EN

A lead-free brass water pressure reducing valve with a built-in strainer, preset to 85 psi and adjustable from 75 to 125 psi for 1-inch FNPT connections

  • TypeOther
  • Reduces inlet pressure to a safe 85 psi preset
  • Adjustable from 75 to 125 psi for system tuning
  • Lead-free brass body meets ASSE 1003 and CSA B356
  • Integrated strainer protects downstream fixtures from debris
  • Rated for 300 psi maximum pressure and 160 °F temperature

High-Pressure Pressure Reducing Valve

This Watts LF25AUB-HP-Z3 valve reduces incoming water pressure to a preset 85 psi for residential and light commercial plumbing systems. It features a lead-free brass body and an integrated strainer to protect downstream fixtures. The unit connects via 1-inch FNPT threads on both ends and meets ASSE 1003, CSA B356, and IAPMO standards.

Replaces Worn or Missing Pressure Controls

Install this valve when an existing regulator fails, is absent, or cannot handle high-pressure supply lines up to 300 psi. The upgrade is worth it when supply pressure exceeds the desired 85 psi preset or when the adjustment range of 75 to 125 psi better matches system requirements. It also replaces units lacking a built-in strainer for debris protection.

Handles 300 psi Inlet

The valve comfortably manages supply pressures up to 300 psi and water temperatures up to 160 degrees F while maintaining the factory preset of 85 psi. It provides adjustment headroom between 75 and 125 psi for fine-tuning system pressure. The unit runs out of capacity if inlet pressure exceeds 300 psi or if required outlet pressure falls outside the 75 to 125 psi range.

Highlights

  • Reduces inlet pressure to a safe 85 psi preset
  • Adjustable from 75 to 125 psi for system tuning
  • Lead-free brass body meets ASSE 1003 and CSA B356
  • Integrated strainer protects downstream fixtures from debris
  • Rated for 300 psi maximum pressure and 160 °F temperature

Specifications

BrandWATTS
TypeOther

Questions about this item

What pipe size and connection type does the LF25AUB-HP-Z3 need for installation?

The valve uses a 1 inch FNPT x FNPT connection, so it threads directly onto 1 inch female NPT pipe ends without additional adapters.

How do I set the outlet pressure on this high-pressure reducing valve, and what common step is missed?

Adjust the pressure between 75 and 125 psi using the adjustment screw; the step often missed is measuring downstream pressure under flow, not static, to confirm the 85 psi preset or new setting.

When should the internal strainer be cleaned or the valve replaced given the 160 Degrees F and 300 psi limits?

Inspect and clean the strainer annually or after pressure spikes; replace the valve if the body shows corrosion, the spring fatigues, or it can no longer hold set pressure within the 75 to 125 psi range.

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