Are Toilet Flanges Standard Size

One common standard toilet flange size is 4x3 and this is the measurement you will find beside most flanges available at your hardware or plumbing stores.

Are toilet flanges standard size.

The bottom of this size flange will fit standard sized drain pipes. The 4x3 size refers to the two diameters in the flange pipe. If you are not certain about your toilet pipe size this flange would be appropriate to use. The top section of the flange that connects to your toilet has a 4 inch diameter while the outlet below this has a 3 inch diameter.

The ring has slots for the bolts that hold the toilet down. This is the size of the flange opening and outlet. In addition a 4 x 3 toilet flange is the size of most closet bend pipes. The flange pipe can have a diameter of either 3 or 4 inches depending on the size of the waste line but a 4 inch hole works in both.

These rings will prevent the toilet from properly recessing into the flange. Some flanges just have one diameter typically 3 inches. A few other flange sizes exist as well. The first thing you ll want to do when replacing or readjusting the height of your flange to shut your water off and remove the toilet from the floor.

Instead use a standard inch wax ring. Once removed examine where your flange is resting. That is so the flange mounts to standard 3 inch drain pipe schedule 40 used in almost every residential home today.