The rough in is a measurement that you need to ensure that your toilet fits snugly against the wall.
Toilet rough in basement floor.
Identify where you want the sink and the toilet to be placed in the basement.
Locate the main drain.
If your 8 inch rough in clearance refers to the distance between the rear wall and the closet flange you face an installation challenge.
Connect the basement bathroom plumbing to the existing drain and vent lines in the floor and ceiling to complete the rough in plumbing.
Or suppose you re roughing in a toilet and there s a floor joist in your way.
Knowing these things can save you time and money.
A crude drawing may be helpful to visualize where the you want the new sink and toilet in relation to the existing pipe.
The toilet flange distance from wall also known as a closet flange is the pipe fitting which mounts a toilet to the floor connecting the toilet drain to the drain pipe.
Most toilet manufacturers produce units that require at least 10 12 or 14 inches between the wall and flange.
Find the main drain line photo 1.
This will also help you when you measure out the length of pvc you ll need.
Choose a toilet with a smaller measurement than your rough in and won t fit against the wall.