Toilet Drain Size

12 inches is the most common toilet rough in size.

Toilet drain size.

The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are sometimes used. Waste drain pipes for toilets in modern plumbing systems are either 3 inches or 4 inches in diameter. Some older model toilets flushing over 1 6 gallons per flush are rated at 4 dfus. Run from the other end of the closet bend to the home s main drain line.

The sewer pipe connects to the toilet flange beneath the toilet and this flange is a standard 3 inches. Water closet s flushing 1 6 gallons or less are rated at 3 dfus drainage fixture units. Toilet drain pipe 3 inch pvc or 4 inch pvc pipe. Plumbers cut it with a hole saw or a reciprocating saw.

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 cases. Typically 3 inch pipes carry the water to the toilet but a 4 inch pipe may be used to move wastewater out of a house to a sewer or septic tank. When combined with a laundry tub the drain pipe must be a minimum of 2 inches in diameter. However it s useful to know that toilet s also come in.

If your home has one or two toilets the standard toilet sewer pipe size is 3 inches. Main toilet drain or stack 4 inch pvc or iron pipe. The typical width of a toilet bowl is 14 the length of a round bowl is somewhere between 16 and 17 while elongated bowls can have a length of up to 19 a compact elongated bowl should be somewhere in between the two other designs. The toilet s drain size.

Toilet fitting sizes flush valve drain hole sizing in most cases for 2 inch toilets this will result in a drain hole size in the range of 2 3 8 to 2 3 4 and so the flange and gasket combinations on our 2 dual flush valves will fit and seal this size range effectively. Regardless of your plumbing code the minimum drain size for a toilet is 3 inches.