In-Airid Vent

AnthraciteEnergetics

Picked up an old radiator and noticed this strange looking plug in the top: In-Airid Air Vent, by American Radiator. If I use this radiator, it will be on a condensate zone in the basement.

Anyone know anything about these vents, would it need to be removed if used on HW (non-pressurized - condensate zone from steam boiler located on the same floor)?

1/8 tapping is also there for hot water air bleed valve.

EBEBRATT-Ed

I would take it out and install a small pet cock or ball valve. You will need it to bleed the radiators and then shut it off

Danny Scully

@DanHolohan just posted an article about these vents. They were for single pipe steam systems. As @EBEBRATT-Ed said, you’ll have to remove the bushing completely if you intent to use it for a hot water system. You would then just install the bleeder there. You could also send me the In-Airid bushing .

Erin Holohan Haskell

Here's the article: https://heatinghelp.com/blog/doctor-bobs-radiator/

And another: https://heatinghelp.com/systems-help-center/in-appreciation-of-steam-radiator-vents/

And the patent: https://heatinghelp.com/assets/documents/360.pdf

gerry gill

Don't throw it away..It is a museum piece