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Old 11-17-2013, 11:19 PM   #1
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Have an older home that does not have any vents connected to any sink, shower etc... There is a 4" stack that all the drains connect to. Next to the 4" stack looks like a 2" line that connects to the 4" stack higher up. Is this the vent? Most of the drains are fairly close 4 to 6 feet. Others are maybe 8 feet or so. Some drains do not seem to drain as well. Is this an old way of venting? Anything to help the water drain? Thanks.

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Old 11-18-2013, 09:33 PM   #2
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perfectly normal re-venting to avoid excessive roof penetration


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