- This topic has 4 replies, 5 voices, and was last updated 20 years, 7 months ago by
Retired plbg1.
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MasterPlumbers
In the school that I work at we had a sewer gas problem. They finelly checked the venting pipe. Is the venting pipe for the sewer to go all the way out through the roof of the building or just caped off inside.
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Who are the “they” who finely checked out the plumbing? Hopefully they were licensed plumbers or building engineers In any case, the terminus of a plumbing vent must be open, not capped, and it nees to be open to the air outside the building. Usually this means going through the roof, but it can be up the side of a building as well. If it opens onto a wall or a roof that is below the level of the main roof, it needs to be at least 10 feet away from any room windows, nor should it open under a soffitt.
NtP
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Sewer gases can be eliminated from the vent “stack” by the use of a charcoal/carbon activated vent pipe filter. http://www.sweetair.com or http://www.odorhog.com makes such products.
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The problem with those attachments that can be put on the roof stacks are:
Sewer gases produce moisture, therefore when the charcoal gets moist, it will freeze and then block the system from properly venting. Not a idea thought through all the way.
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Dont use any of that Mechanical stuff you buy at box store, as the code says you have to vent it through the roof. So do it.
Art retired plbg
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