2-1/2", Water Heater, Temperature & Pressure Relief Valve, With Setting Of 150 PSI, 210 Degrees, Stainless Steel Spring, All Brass Body, Furnished With Test Lever, Epoxy Coated Extension Probe, Extended Inlet 2-1/2", Ans Z21.22 Design, AGA Certified.2-1/2", water heater, temperature & pressure relief valve, with setting of 150 psi, 210 degrees, stainless steel spring, all brass body, furnished with test lever, epoxy coated extension probe, extended inlet 2-1/2", ans z21.22 design, aga certified.