Ao Smith 100109448 Tp Relief Valve 3/4 Inch

Product Description

The AO SMITH 100109448 is a temperature and pressure relief valve sized at 3/4 inch, designed as a critical safety component for residential and light commercial water heaters. This valve opens automatically when water temperature or pressure inside the tank reaches unsafe levels, releasing water to prevent tank rupture or explosion. It is rated for ASME applications up to 500,000 BTU/h and A.G.A. applications up to 100,000 BTU/h. Plumbers and water heater service technicians install this valve as a direct replacement on storage-type water heaters where the factory or existing T and P valve has failed or reached the end of service life.

This valve is a replacement part suited for storage water heater installations in residential and light commercial settings. It installs at the T and P valve port on the water heater tank, typically on the side or top of the unit. The 3/4 inch connection size is one of the most common found on standard tank water heaters. Installations must include a discharge pipe run to within 6 inches of the floor or to a safe drain point per applicable plumbing codes.

Key Features

• 3/4 inch connection size fits standard water heater T and P relief valve ports
• ASME-rated for systems up to 500,000 BTU/h
• A.G.A.-rated for systems up to 100,000 BTU/h
• Automatic pressure and temperature release protects tank from overpressure conditions
• Direct replacement part — designed to restore code-required safety function

Compatibility

Designed as an OEM-style replacement T and P relief valve for storage water heaters requiring a 3/4 inch relief valve connection.

Installation Notes

Installation must be performed by a licensed plumber in accordance with the International Plumbing Code and local authority having jurisdiction requirements. Shut off the cold water supply and disconnect power or gas to the water heater before removing the existing valve. A discharge pipe must be connected to the valve outlet and routed to a safe termination point — never cap or plug the discharge outlet. Do not use thread sealant tape or compounds that could obstruct valve operation.

Technical Specifications

• Type: Temperature and Pressure Relief Valve
• Connection Size: 3/4 inches
• ASME BTU/h Rating: 500,000 BTU/h
• A.G.A. BTU/h Rating: 100,000 BTU/h
• Application: Replacement Part

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109448