Where to buy a fitting like this?

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Asktom

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The double wye is not approved for your application, it needs to be a double sanitary tee (AKA sanitary cross). The double wye creates "S" traps and could syphon water from the traps and break the seal, allowing sewer gas to enter the room.
 

Terry

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The double wye is not approved for your application, it needs to be a double sanitary tee (AKA sanitary cross).

Yes, the double wye is the wrong fitting there.

On lavs I use a double fixture fitting, but not a wye fitting. The double san cross would be okay with your 4"

You can use 1.5" trap arms, and Medium 90 els where you exit the wall.
 

slowgsxr97

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Ok found a local supply house that had a 4x4x2x2 sanitary cross. Here is a pic of it. Let me know what you think terry.

20140314_131349.jpg
 

slowgsxr97

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I really appreciate all the info and knowledge from everyone and the forums. I know why plumbers apprentice for 4-5 years. There is WAY more to it than people realize. I went through a 5 year apprenticeship for my trade also.

Thanks again.

Warning, Ill be back when I do the bathroom in the basement. :confused:
 
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