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  1. #1
    DIY Member Willie Two's Avatar
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    Default My first post

    Firstly I'd like to thank all the experts here who are willing to help the DYSers. I am in a different trade, more commercial, but I also like to help other people do things the right way if I can. Thanks again. I am building a new home myself from the ground up. Currently just in the planning stages, I will be putting in two main floor bathrooms with almost back to back water closets common to the water wall. There will be about 4 feet between the centers of the toilet flanges. I want to place the stack in the best location and I have my first of many questions ( I'll post more questions later ) The question is can I enter the vertical 3 inch pipe with what would be like a double "Y" fitting or should I put one entry just below the other. The stack will be straight up vented and the area underneath the floor joists is a 4 foot crawl space. After the toilets are connect the 3 or what could be 4 inch drain pipe will travel in a sloped / horizontal run about 30 feet to exit the crawlspace into the main drain. Hope this question makes sense. I am in Canada. Thanks to all who reply.

  2. #2
    DIY Member Willie Two's Avatar
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    Anybody ??

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    Moderator & Master Plumber hj's Avatar
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    neither a ]"double Y", nor a sanitary cross, is the correct fitting. You want a "back to back fixture fitting", which halfway between a sanitary cross and a double combination Y-1/8 bend. For two toilets, all you need is a 3" drain line. There are many good locations for the vertical line between the toilets, the BEST one will depend on HOW the toilets line up with the floor framing.

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    DIY Member Willie Two's Avatar
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    Thanks for your reply, the good thing here is the floor joists are not framed yet, easy to reposition the joists or do a "hatch frame" as required to get a well planned out drain system. I went to the canplas website but could not find the fitting you speak of, can you post a picture ?? The entire system will consist of 2 tubs, almost back to back and 2 sinks back to back. I will post a picture as soon as I figure out how Thanks again.

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    One who lurks Basement_Lurker's Avatar
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    canplas does make a double fixture fitting (abs), but you will have to look hard for the #. Don't expect the guys at the counter to know what you are talking about, and certainly not the big box helper. It will also cost you around 50 bux or so for the one fitting.
    Broken promises don't upset me. I just think, why did they believe me? -Jack Handy


    www.blackbirdkitchenandbath.com

  6. #6
    DIY Member Willie Two's Avatar
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    Under the floor is just a crawlspace, never to developed. For me this is just about doing it correctly, it will be inspected, and having it work well. I've attached pictures for you experts to pick apart , please do.
    Attached Images Attached Images   

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