Watts lf25aub34 3/4 in Pressure Reducing Valve 25-75 Psi

Product Description

The WATTS lf25aub34 is a 3/4 inch lead-free water pressure reducing valve (PRV) designed to lower incoming supply pressure and protect downstream plumbing components from overpressure damage. Built from a lead-free copper silicon alloy body with a polymer seat, it delivers a standard factory setting of 50 psi and an adjustable range of 25 to 75 psi. Maximum working pressure is 300 psi. The valve features an NPT female union inlet paired with an NPT female outlet, making in-line installation and future maintenance straightforward. A built-in bypass feature manages thermal expansion pressure, helping prevent system stress in closed-loop configurations. Licensed plumbers install this valve as part of a code-compliant pressure regulation strategy.

This PRV is rated for residential, commercial, and industrial water service. Typical installations include the main domestic water service entry point, branch circuits serving fixtures sensitive to high pressure, and supply lines where local utility pressure regularly exceeds safe fixture ratings. The temperature rating of 33 to 160 degrees F covers standard cold and hot domestic water service ranges. The replaceable seat module allows field servicing without full valve replacement, reducing downtime in commercial settings where water service interruption is costly.

Key Features

• Lead-free copper silicon alloy body meets lead-free compliance requirements for potable water service
• Adjustable pressure range of 25 to 75 psi with a 50 psi standard factory setting
• Maximum working pressure rated at 300 psi for high-pressure supply line compatibility
• NPT female union inlet allows removal and reinstallation without cutting pipe
• Replaceable polymer seat module supports in-field maintenance without full valve swap
• Integrated bypass feature controls thermal expansion pressure in closed systems

Compatibility

Designed as an OEM-style replacement or new-install PRV for 3/4 inch NPT threaded residential, commercial, and industrial potable water supply systems requiring adjustable downstream pressure control.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the applicable edition of the International Plumbing Code (IPC). Shut off the main water supply and relieve system pressure before installation or seat module service. Install with flow direction matching the arrow cast on the valve body. Do not exceed the rated temperature or pressure limits stated on the valve.

Technical Specifications

• Pipe Size: 3/4 inches
• Adjustable Pressure Range: 25 to 75 psi
• Standard Pressure Setting: 50 psi (345 kPa)
• Maximum Working Pressure: 300 psi (20.7 bar)
• Temperature Range: 33 to 160 degrees F (0.5 to 71 degrees C)
• Body Material: Lead-Free Copper Silicon Alloy
• Seat Material: Polymer
• Connection Type: NPT Female Union Inlet x NPT Female Outlet
• Thread Type: NPT
• Applications: Residential, Commercial, Industrial

Standard Information

• Brand: WATTS
• Manufacturer Part Number: lf25aub34