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Hi Again from San Francisco!- Question on Venting
Hello all, You might remember all my epic threads regarding our new boiler and all the ongoing issues we had mainly due to our plumber being not as "with it" as you all are here!
Anyhow, things are going pretty well! We finally found the source of an ongoing steam hammer problem that has been with us since we had an earthquake retrofit done in our garage in 2006. Turns out a main line from the boiler that went horizontal from the header, through the boiler room wall to the garage to the mains and risers had been "reconfigured" by some genius who thought it could go south again for a foot and then back up again a foot later, to more easily go around some of the 2x4's in the wall. So basically we had flat bottom "U" trap with water sitting in it that was waking up the owner in the unit above that area every morning at 5:30 when the boiler came on.
Anyhow, in the process of reconfiguring that pipe, I am afraid my plumber took all my talk of "more venting" to heart and he put a vent right on top of the pipe from the boiler. See the photos below. The old pipe that is no longer connected is still hanging from the ceiling right above the vent so don't let that confuse you. Just please tell me if this is just totally useless, dangerous, or harmless. I don't see any purpose in having a vent this close to the header but I am not a plumber. From all the great diagrams on venting that Rod has sent me through this forum, this does not seem familiar to me and I need to know if I should have my guy remove it before he goes back to insulate the new pipes. Thanks!