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Old 05-31-2012, 05:32 PM   #1
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Toilet plumbing under basement slab


I want to put a 3" PVC toilet drain on existing cast iron 4" drain under slab in basement. I will use fernco no coupling. As in the pic it will be located about 6" from the existing cast iron bend. That bend only has an 1/8" slope or a little more. Is that enough slope?

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Last edited by John Callahan; 05-31-2012 at 06:13 PM.
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Old 05-31-2012, 05:37 PM   #2
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Toilet plumbing under basement slab


Looks like you have the wye backwards.

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Old 05-31-2012, 06:02 PM   #3
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Toilet plumbing under basement slab


That soil stack goes through the foundation and outside. The wye is in the direction of the slope...is'nt that correct?
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Old 05-31-2012, 06:07 PM   #4
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Toilet plumbing under basement slab


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Originally Posted by John Callahan View Post
That soil stack goes through the foundation and outside. The wye is in the direction of the slope...is'nt that correct?
hey john that should be right I see the fall on pipe in picture just make sure the stack is existing house there..what is up line fron your wye........another way is cut it and see I think your fine..
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Old 05-31-2012, 06:18 PM   #5
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Toilet plumbing under basement slab


Installing Toilet/Sink/Shower and there is an existing washer drain at the front.

Thanks so much!
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