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The WATTS 481006 is a temperature and pressure relief valve designed to protect water heaters and hydronic heating systems from dangerous overpressure and overtemperature conditions. Based on the Watts 100XL series, this valve features a 3/4-inch connection size and a pressure rating of 150 PSI. It opens automatically when system pressure or temperature exceeds safe operating limits, discharging water to relieve the hazard. Licensed plumbers and HVAC technicians install this valve as both a code-required safety device and an OEM-style replacement component.
This relief valve is suited for residential and light commercial water heater installations where a 3/4-inch T and P valve is specified. It is appropriate for natural gas, propane, and electric water heater applications where local plumbing codes require a listed temperature and pressure relief device. The 100XL designation indicates compliance with standard relief valve performance requirements for potable water systems.
Designed as an OEM-style replacement temperature and pressure relief valve for residential and light commercial water heaters specifying a 3/4-inch, 150 PSI T and P valve.
Installation must be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Always shut off the water supply and allow the system to cool before removing the existing valve. The discharge port must be piped to a safe drain location per code requirements. Do not cap or plug the discharge outlet under any circumstances.
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