Description
The Watts F158774 Automatic Reseating Temperature & Pressure Relief Valve is a protective control part that safeguards hot water heating equipment by automatically relieving excessive temperature and pressure in HVAC systems. It features a 3/4-inch connection, a 150 PSI pressure relief setting, and an automatic reseating design, allowing the valve to open when operating limits are exceeded and close once normal conditions are restored. Housed on the hot water outlet of compatible storage tanks or water heaters, it continuously monitors internal conditions. Automatic pressure and temperature regulation protects connected components from excessive operating stress, promotes secure operation, and maintains stable system performance.









