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Old 01-27-2012, 10:07 PM   #1
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Adding a shower drain in a cement floor


I am in the works of installing a new shower and have a few questions--

I most likely will be moving the floor drain from were the tub used to be and do i need to vent that line or would it already be vented. There is also a drain from the sink upstairs that runs into the floor as well. I know this will require cutting up the floor and not a biggy.

So which one should i use, and how should the pipes be run. I am not afraid to do any of this job so bring it on Guys!!! Look at the attached picture for explanation. If you want to draw this out go for it.

Thanks to all in advance
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Last edited by robsutton; 01-27-2012 at 10:16 PM. Reason: adding pic
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Old 01-27-2012, 10:14 PM   #2
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Adding a shower drain in a cement floor


Quote:
Originally Posted by robsutton View Post
I most likely will be moving the floor drain from were the tub used to be...
How far?

...do i need to vent that line or would it already be vented.
has it been draining OK?
Quote:
So which one should i use, and how should the pipes be run.
Can't see enough from here to say.

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Old 01-27-2012, 10:16 PM   #3
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Adding a shower drain in a cement floor


No pictures were posted.
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Old 01-27-2012, 10:30 PM   #4
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Adding a shower drain in a cement floor


I would bust out the floor drain and connect to it for the new tub drain. If it is a tub/shower you need 1 1/2" pipe and if it is a shower only it needs to be 2"

It should already be vented because I would assume that it ties into the drain line coming down from the sink upstairs

Also, the way the pipe is connected into the floor drain and being used for the tub removed isn't good. Even though the trap of the floor drain was being used for the tub. I have seen this connection like this come loose and cause major problems.
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Old 01-27-2012, 11:00 PM   #5
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Adding a shower drain in a cement floor


I plan on cutting that pipe off below ground and capping it. Would i just cut into the pipe below were i want a drain and tie it into that line below ground?
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Old 01-27-2012, 11:07 PM   #6
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Adding a shower drain in a cement floor


I would bust out concrete and see where the floor drain goes. You may be lucky enough that it lines up somewhat to what you need for the new tub. Then cut off the floor drain and use a fernco to tie on and run pvc for the tub.
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Last edited by Plumber101; 01-27-2012 at 11:19 PM.
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Old 01-27-2012, 11:15 PM   #7
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Adding a shower drain in a cement floor


Its hard to tell from your picture but some of your studs look like they are directly on concrete. You are not suppose to put studs, or even plywood, directly on concrete like that unless they are approved for exterior use or there is a vapor barrier inbetween.

Last edited by jasin; 01-27-2012 at 11:24 PM.
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Old 01-28-2012, 01:54 AM   #8
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Adding a shower drain in a cement floor


that was the last owners work. It still all needs to be redone. Though thanks for noticing
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Old 01-28-2012, 04:22 PM   #9
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Adding a shower drain in a cement floor


so here is were it is today. My question is not sure which direction to run the p trap. As you see the 2 blue arrows, if you were to intersect them, they would just about be over top of the main line i need to tie into. So, how would i run the trap so that it came back over top of that line so it is done CORRECT.
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Last edited by robsutton; 01-28-2012 at 04:45 PM. Reason: forgot piture again
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Old 01-28-2012, 05:29 PM   #10
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Adding a shower drain in a cement floor


Cut the pipe close to the hub off the 90 where it comes through the concrete. Place a Y and off the Y put the trap. You should be able to angle the trap back far enough so that as the trap comes up you can 90 it to the tub.
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Old 01-28-2012, 09:32 PM   #11
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Adding a shower drain in a cement floor


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Cut the pipe close to the hub off the 90 where it comes through the concrete. Place a Y and off the Y put the trap. You should be able to angle the trap back far enough so that as the trap comes up you can 90 it to the tub.

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