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Hoffman Vents & Vacuum Breakers National Pump Supply
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Hoffman Specialty Air Vents for Steam Heating Applications
NettetThermostatic air vent For steam systems and process equipment Operates on temperature change only; does not close against water Must be installed 6-10″ (150 … NettetHoffman® Air Vent ^ #79 ^ Built-In Check Valve ^ 75 PSI ^ 0.5" NPT Female, 0.75" NPT Male ^ Tapped At The Top For 0.13" NPT Safety Drain Connection ^ Mfg ##79 ... Honeywell 1/8" MPT Air Vent For Hot Or Closed Water Systems. Sign in for price. Add To Cart. Part 212759. Hoffman Model 508 Hot Water Steam Vent. Sign in for price. Add … Nettet12. aug. 2011 · Hoffman Model 4A Part No. 401413, 1/2" x 3/4" Straight Steam Main Air Valve (non-vacuum) - For residential or small one-pipe or two-pipe systems - Install 6-10" (150-250mm) above horizontal return and 18" (450mm) above the boiler water line - Maximum operating pressure 2 psig (0.13 bar)(Drop away pressure - maximum … ppl new customer