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Old 04-19-2012, 05:45 PM   #1
tcarter
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Default moving and extending shower drain pipe

Ok, so I am re doing my bathroom, and Installing a new acrylic shower pan in place of the old shower and the drain of course needs to be repositioned. It have to extend further by an additional 4 inches or so and also needs to move over about the same distance. I have included a diagram to clarify. The existing plumbing is copper, including the P trap with a PVC going vertically to the shower drain. The extension would be simple enough, just cut the pipe behind the P trap, and add a pipe length, but moving it over , or back or whatever, is where I'm not sure.



so questions

1. Is it okay to install an elbow there to redirect it?

2. should i just redo a new P trap with Pvc and tie it into the copper with the rubber sleeve and install an elbow behind the P trap to redirect it or leave the copper P trap and extend with new copper?

3. Is there a flexible pipe/tubing I can use instead?



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Old 04-19-2012, 09:35 PM   #2
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Is there enough height on the PVC riser to use offset fittings there?



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Old 04-20-2012, 01:25 AM   #3
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easyest thing to do would be to chop the copper downstgream of the p trap and extend with pvc and install a new pvc p trap.

make sure you use the correct mj for the job

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Old 04-20-2012, 01:31 AM   #4
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I would do as liquid suggested. You are much better off to have a direct line from the shower to the trap then to have fittings in between the two.

John

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Old 04-20-2012, 12:39 PM   #5
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I was planning on having the line be directly from the drain to the trap, where the fittings would come in to place, is downstream of the p trap to reconnect it to the copper pipe. (see new picture, I am sorry it is not to scale) At that point, what should I use? elbows or one of these offset fittings, which I admit i am ignorant of. Also I do not know what the correct mj for the job means. And the vertical "rise" from the ptrap to the floor above is about 7 or 8 inches or so, if that makes any difference.

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Old 04-20-2012, 12:46 PM   #6
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Use the 45 it's much better to have gradual turns in any waste line. Here is a link to the proper coupling to use. They make one to go from copper to PVC as they have different OD's.

http://www.fernco.com/plumbing/shielded-couplings/proflex-couplings

John

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Old 04-20-2012, 02:43 PM   #7
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Thanks. The 45 it is then.

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Old 04-24-2012, 04:40 PM   #8
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Uh, I actually don't know why I didn't think about this before, duh. All I have to do is twist the new P trap in the direction of the new hole. I only need 3-4" no elbow is needed.

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Old 04-24-2012, 05:01 PM   #9
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You of course can do that but I don't like that fernco coupling between the trap and the shower. You would be better off cutting the copper before the trap and using a PVC trap.
Just my opinion.

John

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Old 04-25-2012, 12:48 PM   #10
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Okay here's a better picture of what I had in mind. Is this cool? The previous illustration showing the coupling between the tail piece and the P trap is what is there now, which I will be replacing.



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