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I’d like to try a single vacuum vent on my bedroom radiator so I never have to hear it hiss at the end of a heating cycle. Let the other radiators out of earshot give the air back to the system.
But where to get one?
Also, when folks are talking about the miracle of vacuum on here, are those systems holding the vacuum for the whole 30-60 minutes until the next heat cycle, or are they just holding it longer than I am?
1 pipe Utica 112 in Cedar Grove, NJ, 1913 coal > oil > NG