Richardson system and air expeller

Dennis Foley

I am restoring a Richardson system, with the ball check return elbows. Some of the balls are missing, but I have found replacements. I will have to add a few steam traps on radiators that have been messed with.

My question is about the air expeller. I assume that it had a check valve, since the Richardson system was a vapor vacuum system.

Have any of you come up with a way to have a main air vent with a check that works to form a vacuum in the returns?

gerry gill

yes, but do you really

want to do vacuum on the system unless its coal..

Dennis Foley

Why not share?

Would you mind sharing what you've come up with?