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Old 10-23-2009, 06:37 PM   #1
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Questions about fixing a drain leak and running plumbing


Right now I have a leak in the bathroom sink drain pipe but pretty the whole thing needs to be replaced... The issue is that ABS and PVC were connected with glue (no primer even) and they connections are going bad.

Should I use ABS or PVC to replace it? I've searched around but nothing says if a certain one is better.

Are fittings/couplings reusable or once they have been glued they should never be reused?

What is the grade for the drain flow? Is 1/4" per 1 foot correct?

I know PVC needs primer before cement but does ABS?

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Old 10-23-2009, 07:56 PM   #2
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Questions about fixing a drain leak and running plumbing


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Originally Posted by CAD View Post
Right now I have a leak in the bathroom sink drain pipe but pretty the whole thing needs to be replaced... The issue is that ABS and PVC were connected with glue (no primer even) and they connections are going bad.

Should I use ABS or PVC to replace it? I've searched around but nothing says if a certain one is better.

ABS and PVC is not allowed to be joined by glued joint. Fernco is acceptale but if at all possible use PVC

Are fittings/couplings reusable or once they have been glued they should never be reused?

NO

What is the grade for the drain flow? Is 1/4" per 1 foot correct?

Yes

I know PVC needs primer before cement but does ABS?
Granted pipe should be cleaned, primed and glue on pressurised pvc but, on non-pressure you can clean and glue. Make sure you twist and hold the fitting in place for a few seconds to hold

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Old 10-23-2009, 08:02 PM   #3
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Questions about fixing a drain leak and running plumbing


You can't reuse the fittings.

As far as ABS or PVC, what is the trap made from? What stubs out from behind the cabinet? If enough of the pipe stub out from the back of the cabinet where the fitting is glued to it, you can cut where the hub meets the pipe then redo it with whatever pipe [ABS or PVC] is being used. If not, try and cut where one of the 90's are where there is enough to put a new fitting on. I am assuming this is probably an all glue trap since you have not said you can just unscrew the old trap.

You can use a transition glue to connect ABS to PVC.

http://www.oatey.com/Channel/Shared/...en_Cement.html
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Old 10-24-2009, 04:28 AM   #4
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Questions about fixing a drain leak and running plumbing


The sinks are ABS and run down to the crawlspace. I'll just cut it and stay with ABS I guess since a later part of the system is ABS too.
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