Oct
21
How to Measure a Toilet Rough In
By
Toilet rough in measuring: from wall to bolt cap.
When talking toilets, the toilet rough in is the distance from the wall behind the toilet to the center of the outlet pipe where the waste leaves the toilet. The most common distance is 12 inches, so most toilets have a “12-inch rough.”
In some cases, the outlet is closer to or further away from the wall, especially in older homes. For those cases, toilets are available with a 10-inch rough or 14-inch rough.
Before replacing a toilet, measure the rough in or make sure your plumber measures before buying.
To measure accurately, measure from the wall–NOT the molding–to the bolt caps, as in this picture. (Note: The Professor sincerely apologizes for the ugly wallpaper.)
6 Comments
September 5th, 2010 at 1:33 pm
Finally, someone who clearly explains how to measure a rough in. I wasn’t sure about whether to account for the molding in my measurement. Thanks
April 16th, 2011 at 6:43 am
Thanks Professor, That was my thoughts–you just confirmed it.
July 14th, 2011 at 6:19 pm
Is is safe to assume that if you measure from the bolts to the wall would equal the center of the outlet pipe?
July 28th, 2011 at 3:52 pm
I have an old crane 4 bolt toilet(oxford) it needs replacement. Ido not know how to figure what will fit
September 23rd, 2011 at 3:19 pm
How do you measure for a corner toilet? frpm the corner or from the the straight side wall?
October 15th, 2011 at 8:12 pm
Thank you you are my hero!!!!