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Old 08-29-2012, 07:00 PM   #1
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Shower Drain in Concrete Slab Install


Hi All,

I'm redoing my basement & needed to move the stack in order to open up the bathroom, so I could install a bigger shower. I've now got it all roughed in but have a question about locating the shower drain before pouring concrete.

The offset for the shower drain is pretty specific & I am nervous to pour concrete right around the drain in case I get it wrong by 1/4". How is this job normally done? Should I build a box around the drain so I can adjust the p-trap & shower drain after? I was going to use a trap that is glued up but should I be using one that will allow for some adjustment?

Thanks
S.

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Old 08-29-2012, 07:09 PM   #2
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Shower Drain in Concrete Slab Install


You didn't state the type of shower so I'll assume a prefab unit- I box out the slab for the trap. About 10x10. Then you can fine tune the trap after framing is completed.
If your building the pan- put the drain in with the slab

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Old 08-29-2012, 09:09 PM   #3
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Shower Drain in Concrete Slab Install


yep I second eplumber
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Old 08-30-2012, 09:33 AM   #4
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Shower Drain in Concrete Slab Install


Yeah it is a prefab corner unit.

Do you use a hard p trap that needs to be glued up?

I'm actually building one of the walls to suit. My original plan was to get the offset from the one wall correct, then build the second wall to get the correct offset

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Old 08-30-2012, 11:51 AM   #5
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Shower Drain in Concrete Slab Install


Quote:
Originally Posted by sharp21 View Post
Yeah it is a prefab corner unit.

Do you use a hard p trap that needs to be glued up?

I'm actually building one of the walls to suit. My original plan was to get the offset from the one wall correct, then build the second wall to get the correct offset

S.
You must use a solvent weld p trap. No slip joints allowed in this application. Also, the shower drain assembly is sized for pipe, not tubing. Use a drain like this, they're available in brass, pvc and abs
http://www.menards.com/main/plumbing.../p-1463986.htm
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