Pumped system

William Faust

My 2-pipe steam system is pumped. The only vent is an open pipe at the boiler feeder. I was planning on installing main vents to speed the purging of air from the mains. Am I on the right track here or is this done only for gravity-return systems?

Steamhead (in transit)

The receiver tank

mainly handles air from the dry returns, which mostly comes from the radiation. Some air passes thru the F&T traps on the steam mains but this is typically not enough for good venting. Vent your steam mains and watch the difference.

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William Faust

Thanks for confirming

my understanding.