American Granby irv75-100nl Pressure Relief Valve 100 Psi

Product Description

The AMERICAN GRANBY irv75-100nl is a heavy-duty bronze pressure relief valve rated at 100 psi, designed for use in residential and light commercial water pump systems. The valve is spring-loaded and factory pre-set at 100 psi — it is not field-adjustable. It features a 3/4-inch male-threaded inlet and a 1/2-inch female-threaded outlet, making installation straightforward with standard pipe fittings. The brass body construction provides corrosion resistance in potable water applications. Compliance with NSF/ANSI 372 confirms the valve meets lead-free requirements for drinking water contact. Plumbers and pump service technicians install this valve as a safety device to protect pump systems from overpressure conditions.

This pressure relief valve is suited for shallow well, deep well, and submersible pump installations. It is commonly installed on the discharge side of a pump or pressure tank assembly to relieve excess system pressure and prevent component damage or piping failure. The factory pre-set pressure rating eliminates the need for field calibration, reducing installation time and the risk of improper adjustment. It is appropriate for residential potable water supply systems where a fixed 100 psi relief point is specified.

Key Features

• Spring-loaded design, factory pre-set at 100 psi — not field-adjustable
• 3/4-inch male-threaded inlet and 1/2-inch female-threaded outlet connection
• Brass body construction for durability in potable water service
• Compliant with NSF/ANSI 372 lead-free standard
• Suitable for shallow well, deep well, and submersible pump applications
• 1-year manufacturer warranty

Compatibility

Designed for use with shallow well, deep well, and submersible pump systems requiring a fixed 100 psi pressure relief valve with 3/4-inch inlet and 1/2-inch outlet connections.

Installation Notes

This valve is installed by a licensed plumber or qualified pump service technician. Shut off power to the pump and depressurize the system before removing any existing valve or fittings. Apply thread sealant or PTFE tape to threaded connections per standard plumbing practice and local code requirements. Verify the valve discharges to a safe location or drain in compliance with IPC and local authority having jurisdiction requirements.