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Thread: Soil stack and venting

  1. #1
    DIY Junior Member Tylock's Avatar
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    Oct 2013
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    Pittsburgh, Pa.
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    Default Soil stack and venting

    Hello, I have an old rental and the soil stack stops at the first floor bathroom with a toilet on top of it which can't be moved. I replaced the old toilet in the basement plus added a wash basin. So those openings that were unintended vents are no longer and nothing worked, total vacuum. I snaked out the trap vent outside that was clogged and installed vents on the three sink traps. Everything works, but not great. There is a 5 inch iron pipe outside that comes out of the ground. It's to the side of the toilet in the basement 3 to 4 feet away. This pipe runs up the side of the house 30 plus feet and ends 3 feet above the gutter. Nothing is connected to this pipe on the exterior of the house. Do you think this is connected to the waste pipe underground? I plan on cutting it down in pieces for scrap then run a snake through it. If this is the vent and it dose work do I have to run a PVC pipe back up past the roof? What do you think?

    Thank you.

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Cave Creek, Arizona
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    Default

    I think your description is too convoluted to figure out what is happening, but the pipe outside, if it is a vent, is useless as far as your indoor piping is concerned.
    Licensed residential and commercial plumber

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