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RobbL 10-23-2009 03:55 PM

Uh oh-wall too close to the toilet drain?
I'm finishing my basement, and realized that I might have built one of my interior walls too close to the toilet drain. I found in a book that it should be 12" on center away from the finished wall. Mine is 11.5" from the UNfinished wall.

Do you expert types think this'll be a problem? It would obviously be painful to move the wall back another inch, but it would be a lot easier to do while it still doesn't have any sheetrock on it.

Thanks in advance!

nap 10-23-2009 04:52 PM

the distance is required for the installation of the toilet itself. There are units that have a lesser center from the wall measurement but regardless, unless you fall in love with such a toilet, I would correct the drain set now so you will not be limited to what toilets you can use in the future.

NailedIt 10-23-2009 05:01 PM

Make sure you have 15" or more either side of center as well. I have a closet drain that I'm about to have to do something about that was roughed in 12"x12" back in 1965. People living here since then have had to sit crooked on the seat when using it for lack of side-clearance.

Plumber101 10-23-2009 05:43 PM

While most toilets require 12" from finished wall there are toilets that are 10" from finished wall

rjniles 10-23-2009 05:46 PM

While toilets require a nominal 12 inches from the finished wall, I have found most toilet will mount fine with 11+ inches.

RobbL 10-23-2009 06:35 PM

Great thanks a lot, everyone. It sounds like my best course of action would be to head to the home-improvement store and make sure that there is a toilet there that we like which will mount with the slightly shortened distance to the back wall.

I have 16" on center to the side, so I'm okay there. That's a good thing because that's an outside wall, so there wouldn't be much I could do there without busting up the concrete.

Thanks again!

oh'mike 10-23-2009 08:15 PM

You would do well to move the wall. The expense of not doing that will make you sorry.-MIKE-

majakdragon 10-24-2009 10:29 AM

If you go to a 10" rough toilet, you may need blocking between the tank and wall to prevent it being broken if someone leans back too hard. You would have an 1-1/2" space between the tank and wall. Most toilets are "forgiving" for 1/2" measurement, even if you need to move the tank bolts towards the front of the holes and a smidge on the flange bolts. 10" rough toilets are not always available without ordering them at Home Centers.

rjniles 10-24-2009 12:04 PM


Originally Posted by rjniles (Post 344638)
While toilets require a nominal 12 inches from the finished wall, I have found most toilet will mount fine with 11+ inches.

And 10" rough in toilets are special order and quite a bit more expensive than 12".

oh'mike 10-24-2009 03:32 PM

Get your sawsall and a flat bar. Cut the wall section loose and move it!

You could have the fix done in less time that it took to type out your question.--MIKE--

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