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Drain Vent Stack problem
My house is a modular unit (not mobile, but built in 4 sections and brough together). There are 2 different drain stack vent sections that rise verticlaly into the attic. In the attic, they tied the two stacks together with PVC pipe and a joint. That way there is only one roof opening. Last year, the joint leaked and caused a ceiling problem. I fixed the joint and had the drywall repaired.
Now, we are having the same problem at the new joint. So I have damaged drywall ceiling their. In addition, something has gone wrong at one connection to the vertical stack as that bathroom is getting fumes from the stack pumped into it somehow. I've closed the drains on the tub and sink. But with the p-traps, I doubt that's the cause.
I'll go up and look at it tonight. But is it common to link two vertical drain stacks together like that? I think as the house shifts (I don't know if the foundation is substandard or not) during the winter freeze/thaw routine, the connection sections are getting pulled apart and the joints are failing.
Is it common to link them together like this? If it is getting pulled apart, is the best solution to separate them and put a new opening in the roof?
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Drain Vent Stack problem
Well, first off, the horizontal run is buried under the insulation in the attic so there should be no ice. There is condensation/water in the pipes because that is what is leaking out and wrecking the ceiling drywall.
As for house movement, some sections have cracks in the walls and in winter, the bathroom counter top pulls away from wall at least 1/16" to 1/8". I had caulked it in fall when we repainted the bathroom. It has pulled the caulk off the wall.
The flange around the pipe in the roof is not a problem as there is no water evidence of it getting in there.
Finally, ice is not going to be the problem as the air temp has been consistently above freezing the last couple of weeks. I wish you guys could see some of the cheap-ass problems I have found since I bought the place. Frustrating, really.
I think I'm going to split the connection and run the other one up through the roof on it's own. But I'll check it out first to see where th fumes are coming in at. I'll let you know what I find. My wife has the camera for a baby shower so no photos.
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Drain Vent Stack problem
Well, I'm not sure what is going on with that drain stack now. The one bathroom is still getting fumed bad. But the kicker is the toilet won't flush properly now. It fills up and then drains down. You can hear the water draining out. So something is clearly messed up. I hope something didn't crawl in there and die.
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02-18-2005, 07:37 
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