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Topic by bonobo posted 10-11-2013 03:28 AM 3640 views 0 times favorited 4 replies Add to Favorites Watch
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bonobo

1 post in 1770 days

10-11-2013 03:28 AM

Topic tags/keywords: dwv drain vent plumbing

I’m getting some conflicting advice about the best way to join a tub drain to the main stack.

I have a book that warns against using anything but a sanitary T-fitting when joining a sink to a vertical drain/vent. The worry (as I understand it) is that using a connection with too much downward sweep will cause siphoning. I’m assuming the same principle applies when joining a 1-1/2” tub drain to a 4” vent stack (the P-trap is about 5 feet from the stack)

The problem is, I’m joining a bathtub drain to a main stack and can’t make the connection anywhere near level to the P-trap. I need a drop of about 10”. Going by the book, I’m thinking that a configuration similar to this would work:

...but I’ve also been told that this setup with a Y and short 45 would work perfectly fine:

Any informed opinions?



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janicedemesa

2 posts in 1768 days

10-13-2013 03:19 PM

now i understand the meaning of it like this plumbing works. Now I am sure everything would be that perfect.
thanks,
Janice – bathroom renovation salt lake city

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Charlottergreenberg

19 posts in 1667 days

01-22-2014 06:38 AM

The Plumbers Connection “I am a bit of a DIY guy, but I know my limits. Joe, from the … I already had an idea of the problem with my water heater.

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Charlottergreenberg

19 posts in 1667 days

01-25-2014 09:32 AM

This includes all piping connected to piping conveying runoff from buildings. The portion of the storm plumbing system under the authority of the Wisconsin.

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ThomasMaloney

5 posts in 1420 days

01-14-2015 08:14 AM

I was working with a similar situation like you had but it was more of a problem with my hot water storage tank. It was tough at first to DIY everything manually but eventually I realized how satisfying it felt accomplishing something so complex but so simple at the same time. I guess it is not entirely impossible but it just requires effort and proper procedures to go along with it.

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