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Lead-free brass pressure reducing valve with FNPT union connections

Watts

Watts 11/4 LF 25AUBZ3 Pressure Reducing Valve 1-1/4 in FNPT Union

SKU CH-P22B-RSPNH MPN 11/4

Lead-free brass pressure-reducing valve with 1-1/4 in FNPT union connections, factory-set at 50 psi and adjustable from 25 to 75 psi, rated to 160 °F and 300 psi

  • TypeDrain Components
  • Lead-free brass construction meets ANSI A 112.26.2 and ASSE 1003 standards
  • Preset at 50 psi with adjustable range from 25 to 75 psi
  • FNPT union connections simplify installation on 1-1/4 inch piping
  • Rated for 300 psi maximum pressure and 160°F maximum temperature
  • Certified to CSA B356, IAPMO and military standard MIL-V-18146B Type 1

Lead-free brass pressure reducing valve

The Watts 11/4 LF 25AUBZ3 reduces incoming water pressure to a preset 50 psi with an adjustable range of 25 to 75 psi. It is built from lead-free brass and rated for a maximum temperature of 160 degrees F and a maximum pressure of 300 psi. The valve uses FNPT union connections on both ends for a 1-1/4 inch pipe size. It meets ANSI A112.26.2, ASSE 1003, CSA B356, IAPMO and military standard MIL-V-18146B Type 1.

Verify pipe size and thread type before ordering

Confirm that the existing supply line uses 1-1/4 inch FNPT threads to match the valve connections. Check that the system operating pressure does not exceed 300 psi and that water temperature stays within the 160 degree F limit. Ensure there is enough straight pipe run to accommodate the 11 inch length and 9-1/2 inch height of the valve body. No strainer is included, so consider upstream filtration if debris is a concern.

Union connections simplify installation and service

The FNPT union ends allow the valve body to be removed without cutting pipe, making maintenance or replacement faster. Lead-free brass construction satisfies low-lead plumbing codes for potable water systems. The preset 50 psi setting works for many residential applications, while the 25 to 75 psi adjustment range covers most local code requirements. Compliance with ASSE 1003 and CSA B356 supports inspection approvals.

Highlights

  • Lead-free brass construction meets ANSI A 112.26.2 and ASSE 1003 standards
  • Preset at 50 psi with adjustable range from 25 to 75 psi
  • FNPT union connections simplify installation on 1-1/4 inch piping
  • Rated for 300 psi maximum pressure and 160°F maximum temperature
  • Certified to CSA B356, IAPMO and military standard MIL-V-18146B Type 1

Specifications

TypeDrain Components
BrandWatts
Model11/4 LF 25AUBZ3

Questions about this item

What comes in the box and what must I buy separately?

The valve body is supplied with FNPT union connections on both ends. No strainer is included. You will need matching 1-1/4 inch FNPT pipe nipples or adapters and thread sealant to complete the installation.

Which preset or adjustment range should I select for my system?

This model is preset at 50 psi and can be adjusted between 25 and 75 psi. Choose it if your target downstream pressure falls inside that range; otherwise a different spring kit or model is required.

What does the 300 psi maximum pressure rating mean once the valve is installed?

It is the highest inlet pressure the valve housing can safely withstand at up to 160 °F. Your supply pressure must stay below 300 psi to avoid damage, even though the outlet is regulated to the 25–75 psi range.

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