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Old 03-10-2017, 02:56 PM   #1
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2nd bathroom in basement


Now the wife wants a full bath in the basement. My sink, toilet and tub sit directly above the 4" sewer line. Space is to small to connect into a 3". Can I run each line into the 4" individuality like in the picture? Also will I need to vent the toilet aswell, or wet vent from the sink
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Old 03-10-2017, 05:10 PM   #2
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Re: 2nd bathroom in basement


No. You will need to branch off the four inch to pick up your bathroom as a separate entity. Your wet vent is not allowed to have the rest of the house flowing through it. So I would move your proposed bath accordingly.
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Old 03-10-2017, 10:28 PM   #3
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Could I vent the toilet
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Old 03-11-2017, 02:59 PM   #4
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Re: 2nd bathroom in basement


Yes but it must be a vertical vent until it's 6 inches above the bowel.

You also cannot use a sanitary tee on it's back for any drainage.

Last edited by Ghostmaker; 03-11-2017 at 03:12 PM.
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