Pressure Relief Valve Body Material Copper Silicon Alloy Inlet Type NPT Outlet Type NPT Inlet Size 1/2 in Outlet Size 1/2 in Factory Set Pressure 150 psi Pressure Range 75 to 125 psi Disc Material Silicone Overall Height 3 11/64 in Application Domestic Storage Tanks Tankless Water Heaters Spring Material Stainless Steel Temp Range 210 Degrees F Test Lever No Compliance ANSI Z21.22 BAA Compliant CSA Standards ANSI Z21.22 BAA Compliant CSA