smelly soil stack


Old 01-23-05, 08:47 AM
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smelly soil stack

I'm having an unusual problem I was hoping someone could help me with.

One of the two soil stacks in my house emits copious amounts of sewer gas. Depending on the wind direction, it can be so smelly that it prevents us from using our yard. On a cold day like today, you can actually see vapor spewing from the stack. I donít see vapor coming from any of the other stacks in my neighborhood.

Our home is a ranch on a slab foundation. The offending stack is the one located near the bathrooms.

Any ideas???


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Old 01-23-05, 10:02 AM
majakdragon's Avatar
Join Date: Jul 2003
Location: N.E. Arkansas
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bergwp, Welcome to the DIY Forums.
What you have is pretty weird. The main stack becomes a vent line after the last fixure (toilet, sink,tub) enters it (going upwards). The purpose of the vent is to allow air into the main drain to facilitate drainage. If there is no source of air then the fixtures will bubble or pull water out of the other fixture traps. For a smell to be coming OUT of the stack, tells me that something is PUSHING it out. Perhaps a plugged drain to the sewer or septic tank. Good luck.
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