4A VENT 1/2" x 3/4" MAIN-STEAM

HoffmanSKU: 401413

Sale price$71.00


Model 4A - Part No. 401413
Air Valve (non-vacuum)
• Float-type thermostatic vent
• For residential or small one-pipe or two-pipe systems
• Single non-adjustable port
• 1⁄2" NPT female and 3⁄4" NPT male straight shank
• Install 6-10" (150-250mm) above horizontal return and
18" (450mm) above the boiler water line
• Maximum operating pressure 2 psig (0.13 bar)*
• Maximum pressure 10 psig (0.7 bar)

*Drop away pressure (maximum pressure against which the vent can open).

Product Documents

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