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Old 12-31-2014, 05:01 PM   #1
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Replacing a 1.25" Copper Sink Drain with PVC


Hi all - Happy New Year!

I'm demoing a small half-bath and would like to replace a 1.25" copper drain for the sink (I think it's copper) with PVC. The drain is tying into the vent stack pipe coming from the toilet.

What's the best way to do this? Here's a picture of the existing piping.

Replacing a 1.25" Copper Sink Drain with PVC-2014-12-29-13.41.12.jpg

Sorry for the darkish picture. The pipe I'm referring to is the horizontal piece.

Thanks!
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Old 12-31-2014, 05:24 PM   #2
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Unscrew it from the cast iron tee and thread a abs or pvc 1.5" MIP adapter in the hole . Use Teflon tape and pipe dope.

MIP Male Iron Pipe.
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Old 12-31-2014, 07:18 PM   #3
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Sounds pretty straight forward. Thanks!
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Old 12-31-2014, 07:30 PM   #4
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Make sure you buy the adaptor that says 1-1/2-1-1/4 on the paper cap. There's two different washers included so it can fit 1-1/2 or 1-1/4 pipe.
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Old 12-31-2014, 07:36 PM   #5
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Will do, Joe. Appreciate the heads up!
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Old 12-31-2014, 09:31 PM   #6
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Hopefully the 4" tee is tapped for 1.5". Around my area you cannot get 1.25" drainage pattern fittings- only 1.5" and larger
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Old 01-01-2015, 09:05 AM   #7
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Make sure you use a 2 foot pipe wrench and PB blaster it first.
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