Watts LFBP30 75-175 1/2 Lead-Free Relief Valve, Copper, NPT

The Watts LFBP30 75-175 1/2 is a 1/2" lead-free calibrated adjustable pressure relief valve for pump bypass pressure control service, field-adjustable over 75-175 psi. It features a copper body. Rated to 175 psi and up to 180°F. This model is certified lead-free for potable-water installations.

This 1/2 inch bypass control relief valve is used in commercial, residential and industrial applications to regulate liquid pressure as supplied by a positive pressure pump. It is a diaphragm-operated type valve that protects equipment by opening at an adjustable range of 75 to 175 psi (5.2 to 12.1 bar) to allow excess volume to be bypassed back to the source. It consists of a lead free alloy body with NPT threaded male inlet and NPT threaded female outlet, sensitive rubber diaphragm, Buna-N disc, tee handle, a spring, and adjustment handle separated from liquid elements.

Features

• Lead free copper silicon alloy body construction
• Sensitive rubber diaphragm
• T-handle facilitates pressure change
• Adjustable opening pressure range at 45 to 100 psi
• Includes: Bypass

Common Questions

What pressure does this relieve at?

This is a calibrated valve — you set it. It adjusts over 75-175 psi, so it has no factory set point. Set it below the working pressure rating of the equipment you are protecting, and re-check the setting after installation.

Can I use this on potable water?

Yes. It is certified lead-free to NSF/ANSI 372, which is what plumbing codes require for any device in a drinking-water line.

Specifications

• Type: Relief
• Size: 1/2"
• Inlet Size: 1/2"
• Outlet Size: 1/2"
• Connection: NPT
• Body Material: Copper
• Max Pressure (psi): 175
• Pack Quantity: 12
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LFBP30 75-175 1/2
• Temperature: up to 180°F
• Lead-Free: Yes
• Relief Type: Calibrated Adjustable
• Adjustment Range: 75-175 psi
• Application: Pump Bypass Pressure Control
• Connection Configuration: MNPT inlet x FNPT outlet
• Approved for Potable Water: Yes
• SentryPlus Alert Flood Sensor: No