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Old 04-05-2009, 09:15 AM   #1
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Full bath in basement - Questions


So i have a standard Builder rough-in for plumbing in my basement. I have framed my bathroom and everything is set in place. The Shower/Tub stub is positioned at 8.5" from the wall to centre drain, and 18" from the side wall to centre drain. I have had three plumbers in and all have different thoughts. The first said that I would have to break the floor in a 12"x12" square around the stub regardless of what i place in that space. The other two didnt know why i would have to do that. If I have to break the floor around the stub, then I would like to put in a stand up shower and move the stub back 2 or so inches ... Otherwise i just would drop a tub in and make the necessary connections ...

Can anyome please help and provide advise?
Anyone had this dilemma with thier basement?

I have attached a picture ...
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Last edited by whirly; 04-05-2009 at 09:21 AM.
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Old 04-05-2009, 11:40 AM   #2
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Full bath in basement - Questions


The reason you need to open the concrete is because the drain piping that will be connected to the tub ie the waste and overflow will set below the tub which will be in some of the depth of the concrete.

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Old 04-05-2009, 12:17 PM   #3
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Full bath in basement - Questions


I agree with plumber Jim. I cannot tell what size the tub drain piping is, but it needs to be 2" for a shower unit. Only needs to be 1-1/2" for tub/shower combo.
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Old 04-05-2009, 02:23 PM   #4
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Full bath in basement - Questions


For a tub you need to remove the concrete as posted to make the drain connections. for a shower you will not, you can make a custom base to set the drain where it is or even use a Kerdi drain with systems from Schluter.
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Old 04-05-2009, 04:00 PM   #5
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Full bath in basement - Questions


While Bob Mariani may be correct about the type of base to install, , you need to insure there is a trap under the concrete or add one. Seriously doubt a trap is installed.
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Old 04-05-2009, 05:56 PM   #6
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Full bath in basement - Questions


Also, the toilet riser that is stubbed up needs to be chipped up around the pipe to get the flange on, unless it is not a 3" pipe and is a 4", but it looks like 3" in the pic, and watch out if it is a standard tub/shower then the pipe needs to be 2" or less off the right wall and around 15" offf the back, unless the tub is wider than 30". if it is a shower "base" than some bases drain connections sit around 1"1/2 inches below the concret in which case you will need to chip up the perimiter of the pipe, now for the 12 x 12 hole they told you to chip up, all that concrete is not needed to be removed just a channel going from the shoe to your pipe.
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Old 04-05-2009, 06:57 PM   #7
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Full bath in basement - Questions


I never knew ABS was still being used until I joined this site.. I though everyone had transitioned over to PVC .. No ABS around here.. PVC or ductile iron
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Old 04-05-2009, 07:15 PM   #8
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Full bath in basement - Questions


no ABS in CT either, yet Lowes still sells it here.

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