Intended for protection of hot water heaters and storage tanks Incorporates an inert thermal element coating that provides effective isolation from mineral deposits, liming, and galvanic corrosion Cast bronze body with male inlet and female outlet, brass and stainless steel internal parts, silicone seat disc and stainless steel spring Test lever standard Factory-set relief settings 210F temperature relief setting 5 element extensions 125 PSI 3/4-in Carded