Adjustable Antisiphon Relief Valve, Body Material PVC, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1/2 in, Outlet Size 1/2 in, Pressure Range 5 to 100 psi, Overall Height 6 37/64 in, Application Concentrated Etchants, Ultra-Pure Water, Water, Overall Length 2 1/2 in, Seat Material PTFE, Spring Material Zinc-Plated Steel, Temp. Range 32 Degrees to 140 Degrees F, Test Lever No