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Old 03-10-2017, 11:09 AM   #1
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Plumbing half bath


So we decided to scrap putting in a full bath. I want to join this into main sewer line. Can I connect the sink with 2" and the toilet with a 3".
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Old 03-10-2017, 11:19 AM   #2
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I forgot to mention this is in the basement and space is limited. Can not connect 2" into the 3" unless we reconfigure bath
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Old 03-10-2017, 11:20 AM   #3
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Re: Plumbing half bath


If you are piping a lav, you can use 1.5" You can also pipe the lav off the 2" toilet vent (wet vent) if configured properly. Your toilet venting looks a little off. But that may just be the picture...
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Old 03-10-2017, 11:32 AM   #4
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Ok, could I use 2" on the lav, and let that wet vent my toilet? Or is that wrong
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Old 03-10-2017, 11:46 AM   #5
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The toilet and sink Drain will be about 4' apart
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Old 03-10-2017, 01:55 PM   #6
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If I wanted to add a shower beside the toilet would I run a 2" line into the 4" with ptrap and vent it out 2"
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Old 03-10-2017, 05:12 PM   #7
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Re: Plumbing half bath


A wet vent cannot have the entire house drainage flowing through it.
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Old 03-10-2017, 10:48 PM   #8
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Could I vent the toilet to the main stack with 2" vent
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Old 03-11-2017, 02:58 PM   #9
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Re: Plumbing half bath


A vent has no drainage coming down it from above.
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