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On 5/10/2015 2:09 PM, Cheri wrote:

I'm hoping someone can give me an answer since the floor
installer says one thing and the plumber that will be picking up
the toilet and installing it says another. The rough in is 11
1/4 by the floor installer measurement, but the plumber said it
is 10 1/2 which he would have to order and would cost more. My
measurements come out 11 1/4 so assuming that 11 1/4 is right
will a 12 in rough in toilet, which most are it seems, fit this?
Thanks for any help, it's driving me crazy trying to figure it
all out.
Are you all measuring to the same point, i.e. the edge of the
rough in, or the center?

Measuring to the center which the plumber said he did, and the
floor installer did while I watched him, then my husband did, and
I did. 3 come out with 11 1/4. Plumber comes out with 10 1/2.

The rough-in measurement is supposed to be from the center of the
sewer drain to the finished wall behind the toilet. I assume that
is what you are measuring -- to the finished wall, not to the edge
of the wall base trim. And, of course, if the wall is not yet a
finished wall (maybe just studs at this point), you have to be sure
that you include the thickness of any sheetrock and/or tile etc.
that will be on the wall behind the toilet. But, again, I assume
that you and your husband already did all of that and that is how
you came up with the 11 1/4 inch rough-in. Now, here's where it may
get a little tricky. The rough-in allows
for a small space between the back of the toilet tank lid and the
wall. So, a 12-inch rough-in toilet, when placed on an exactly
12-inch rough-in sewer line center line will not go back the full 12
inches to the wall -- it will leave a little space behind the toilet
tank lid and the finished wall.

I just went online and picked a Kohler toilet at random and I looked
at the specs sheets. The one that I picked is a 12-inch rough-in
toilet, and the spec sheets for that toilet show that if it is
placed over a 12 inch rough-in sewer line, there will be a 1/2 inch
space left between the toilet tank top and the finished wall. Or,
to put it another way, if you put that toilet on an 11 1/2 inch
rough-in sewer line, the back of the toilet tank top would end up
flush against the finished wall with no gap at all.

But, you said you have an 11 1/4 inch rough-in right now. I think
that means that if the same Kohler toilet were placed on your 11 1/4
inch rough-in, the toilet would not fit because the toilet tank top
would have to intrude into your finished wall by 1/4 inch.

Here is the link to the specs for the sample Kohler toilet that I
picked. Scroll down and look at the dimensions from the back of the
toilet tank lid to the finished wall (which is 1/2 inch) -- if the
rough-in were 12 inches.
http://www.us.kohler.com/webassets/k...-3817_spec.pdf

If you know the exact toilet model that you will be putting in,
maybe you could look that up online and see the spec sheet with the
dimensions. It should show how far back the back of the toilet tank
goes and what the gap would be to the finished wall with a 12 inch
rough-in. Then, you would have to figure out whether it will still
fit if the rough-in is 11 1/4 inches instead of 12 inches.

OK, thanks to all for the helpful answers. Got it. :-)

Here's a P.S. in case it helps.

I just randomly picked another toilet model (a Gerber toilet), and
that one shows that it would have a 1-inch gap between the toilet and
the wall with a 12-inch rough-in. So, with your 11 1/4 inch
rough-in, I think that means that toilet model would still leave you
a 1/4 inch gap between the toilet and the wall. In other words, that
model of 12-inch rough-in toilet would fit in your 11 1/4 rough-in
space. So, you may want to check various other toilet models of your
choice and see what they show for the gap with a 12-inch rough-in,
and compare that to what it would mean with your 11 1/4 inch rough-in.

Oops, I forgot to add the link:


http://www.gerberonline.com/download...let/20-832.pdf