Hoffman 401413 # 4A Steam Vent 3/4" Male Or 1/2" Female Connection
Model 4A
Part No.401413 Air Valve (non-vacuum)
Specifications:
- 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)