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Why is the outlet of the Barnes & Jones BJ-3BM “Big Mouth” vent threaded?
I bought some Big Mouth vents and I’m curious why the outlet is threaded. Is it to handle any water that might spit out?
PS I did search for this answer, but feel free to just provide a link if this question has been answered before. Thanks!
Homeowner from Providence, RI
Home b. 1897, one-pipe steam with a indirect gravity hot air system using Gold's pin radiators.