How Much Venting for Mains??

racingkaherva

We moved into a house a year ago with a single pipe steam system. My daughter's room is the coldest and the last radiator off one of the mains. Our basement is finished, so it is a bit difficult to know exactly what is going on, but from what I can see the mains are not vented. I figure this first thing that has to happen.

One thing I can't figure out is how much venting is appropriate for each main line. The mains are 2" pipe. One is 33 ft long; the other is 47 ft. long.

Any ideas on what vents I should be using?

Jamie Hall

I'd probably use a Gorton #2 on each of them, or a BigMouth.

Gsmith

I'd suggest one Barnes & Jones Big Mouth or one Gorton #2 on each main.

racingkaherva

Thank you, both. One Gorton #2 on each main be enough? I thought I might need more given the length of each.

Fred

If it were me, I'd install a Barnes and Jones Big Mouth on each Main. They have twice the venting capacity of the Gorton #2 and cost the same. Much better quality, solid brass and plenty for each main.