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Old 08-23-2011, 02:08 PM   #1
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Using rubber couplings on drain lines.


I cut into a copper drain line to add a Y to connect a dishwasher. I used PVC and joined them with two rubber couplings. Now I'm selling the house and a home inspector told the new buyers that I needed to remove the rubber and have it "plumbed properly". Is using rubber couplings not OK or against code? I live in a small town outside of St. Louis, Mo. Hopefully someone will give me some facts I can give to the prospective buyers.

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Mike.

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Old 08-23-2011, 02:27 PM   #2
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Using rubber couplings on drain lines.


You could remove the rubber coupling and glue a 75 PVC coupling in it's place in a few minutes.

Then it will meet code.

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Old 08-23-2011, 02:44 PM   #3
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Using rubber couplings on drain lines.


Going from copper to PVC? The copper has an outside diameter of around 1 3/4" and the the PVC is 2" OD.
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Old 08-23-2011, 02:47 PM   #4
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Using rubber couplings on drain lines.


Here is what it looks like.

Mike
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Using rubber couplings on drain lines.-sink-drain-lake-tish.jpg  
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Old 08-23-2011, 02:56 PM   #5
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Using rubber couplings on drain lines.


Ah, sorry, didn't see the part about copper to PVC.

Hopefully a plumber will chime in with the correct answer.
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Old 08-23-2011, 03:26 PM   #6
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Using rubber couplings on drain lines.


Areas vary. But a shielded coupling (no-hub) should work.
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Old 08-23-2011, 11:15 PM   #7
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Using rubber couplings on drain lines.


A shielded coupling looks like this.

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Old 08-24-2011, 07:38 AM   #8
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Using rubber couplings on drain lines.


What is that copper pipe draining? A dishwasher has to be trapped, that's why they're usually connected to a sinks trap arm. If that line is a trap arm, cut out the whole mess and using an 1 1/2" copper to PVC transition coupling like the other guys talked about, repipe the sink. If it's not on a trap arm, you'll have to post more pics and we can figure out a way to trap the dishwasher, and vent it.
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Old 08-24-2011, 08:03 AM   #9
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Using rubber couplings on drain lines.


why wasn't it hooked in to the drain under the kitchen sink or the disposal if you have one?

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