Hoffman 71C, 1/2" x 3/4" Straight Steam Convector Air Valve

Air Valve (non-vacuum) Float-type vent Single non-adjustable port Meets Federal Specification WW-V-151 for Type 1 Non-Adjustable Valves Telescopic siphon tube with angle cut assures drainage 1⁄2" NPT female and 3⁄4" NPT male straight shank Maximum operating pressure 11 psig (0.8 bar) (Drop away pressure - maximum pressure against which the vent can open). Maximum pressure 15 psig (1.0 bar)