I have a system with Illinois NO 2 traps on the radiators.

Charlie from wmass

I will be calling state supply in the A.M. but I was wondering if anyone has the venting capacity of them. The balancing book and greening of steam just list the NO 1 Illinois.

Thanks guys. I will be saving the photos of this one if I get to deknucklehead it.

Steamhead

I'd think slightly more than the #1

It would also depend on what repair kit was used in them. Does State Supply handle B&J or Tunstall?

Charlie from wmass

They handle B&J

F.W.Webb has both. Do you have a preference?