Adjustable Back Pressure Relief Valve Body Material PVC Inlet Type FNPT Outlet Type FNPT Inlet Size 1 in Outlet Size 1 in Pressure Range 5 to 100 psi Overall Height 9 13/16 in Application Acids Highly Corrosive Liquids Overall Length 3 in Seat Material Viton Spring Material Zinc-Plated Steel Temp Range 32 Degrees to 140 Degrees F Test Lever No