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unusual venting situation?
just want to ask your opinion on an unusual ( to me) venting situation that i encountered on the job yesterday. we replaced an existing steam boiler with a WM SGO5. most of the house is 1 pipe except possibly 2 radiators. all of the 1 pipe radiators had their vents replaced as well as the main vents. the customer has lived there for 26 years and said that the 2 radiators in question never heated well, if at all. So in trying to describe what is happening, picture this:
the last take off on one of the 2" mains is 1-1/4" that goes to about 10 feet of 1-1/4 steam baseboard. no enclosure and hung about 2 feet from the floor. it is pitched upwards from the supply side. the return end has a 3/4" x 3/4" x 1-1/4" bullheaded tee and the bottom of this tee is a 3/4" iron pipe that goes back and ties into the wet return on the floor in the basement. no steam traps etc and properly pitched. the upper side of the tee was bushed down several times to end up with 1/8" and they had a regular hot water autovent screwed in. i removed all bushings and installed a hoffman 4a since the #75 would look ridiculous. my reasoning was that that particular spur is last on the main and assumed that the radiator would need a vent. but then i wasnt sure because it had it's own condensate return. I am not sure if this main dead ends or continues on to a drop into the wet return. the spur has another section of baseboard on it also piped the same way but wasnt able to locate a vent on it. since the customer said neither ever heated well i figured i must be improving something. no pictures at this time but i can get some and post here this afternoon if necessary. let me know what you all think and if this post even makes sense.