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Brass water pressure reducing valve with union connections

Watts

Watts 1 LF 25AUB-Z3 Water Pressure Reducing Valve

SKU CH-DAS1-3SB3C

A lead-free brass pressure-reducing valve with a built-in strainer, factory-set to 50 psi and adjustable from 25 to 75 psi for 1-inch FNPT union connections

  • TypeDrain Components
  • Lead-free brass construction eliminates lead exposure risk
  • Built-in strainer protects downstream fixtures from debris
  • Factory preset at 50 psi for immediate balanced pressure
  • Adjustable 25 to 75 psi range suits varied supply conditions
  • Certified to ASSE 1003 and CSA B356 for code compliance

Water Pressure Reducing Valve

The Watts 1 LF 25AUB-Z3 reduces incoming water pressure to a preset 50 psi, adjustable between 25 and 75 psi. It fits 1-inch FNPT union connections and includes an integrated strainer. The lead-free brass body meets ASSE 1003 and CSA B356 standards for potable water systems.

Thermals Noise and Power

This valve operates mechanically without electrical power, so it produces no noise or heat of its own. The brass construction handles water temperatures up to 160 degrees F and a maximum inlet pressure of 300 psi. Normal flow passes through the strainer and seat without vibration when pressure stays within the adjusted range.

Sustained Load Behaviour

Under continuous high demand, the diaphragm modulates to maintain the set pressure across the 25 to 75 psi adjustment range. The strainer collects debris to protect the seat from erosion during prolonged flow. The valve remains within its rated 300 psi maximum inlet limit and 160 degrees F temperature ceiling during extended operation.

Highlights

  • Lead-free brass construction eliminates lead exposure risk
  • Built-in strainer protects downstream fixtures from debris
  • Factory preset at 50 psi for immediate balanced pressure
  • Adjustable 25 to 75 psi range suits varied supply conditions
  • Certified to ASSE 1003 and CSA B356 for code compliance

Specifications

TypeDrain Components
BrandWatts
Model1 LF 25AUB-Z3

Questions about this item

How is the 1-inch FNPT union connection installed and what step is often missed?

Thread the FNPT union ends onto the 1-inch pipe using thread sealant; the step often missed is tightening the union nut after the tailpiece is seated to prevent leaks.

What maintenance will the built-in strainer need later?

The integral strainer should be removed and cleaned periodically to keep debris from restricting flow through the valve body.

At what temperature limit does the lead-free brass body reach its maximum rating under sustained use?

The valve is rated for a maximum temperature of 160 degrees F; sustained exposure above this limit can degrade the brass and seals.

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