Rough in is measured from the center of the drain to the wall behind the toilet.
Toilet rough in size 11 5.
If you select the wrong rough in size for your bathroom you will either end up with a toilet that will not fit or one with a large gap between the back of the tank and the finished wall.
Follow these step by step instructions for measuring the toilet rough in.
Toilets are typically offered in either 10 inch 12 inch or 14 inch rough ins.
10 and 14 are also possible and you ll have a smaller selection of toilets that fit those sizes.
Never measure from the molding baseboard to the flange only against the wall.
I d say 80 of toilets have a 12 rough in so don t be surprised if you do as well.
Remember the center of the toilet flange to the wall should be 12 inches.
If your measurement comes out to 11 5 or 12 5 then don t worry it s likely a 12 rough in.
The standard rough in is 12 inches though you may encounter 10 inch and 14 inch rough ins in older homes.
You should find the rough in measurement in the new toilet s product information.
The 12 inch rough in is by far the most common in the us.
If you measure a few times and come up with 10 or 14 inches you will need to replace with the proper size toilet.
In most cases you can measure the distance between the wall and the toilet hold down bolts as these bolts are usually located at the drain center.