Toilet Drain Size

Toilet rough in details.

Toilet drain size.

This is a standard size pipe for toilet drains in most homes and all main drain stacks usually consist of 4 inch diameter pipe. These plans call for 3 inch diameter pvc pipe for the main drain and the short length leading from the toilet to the drain and 2 inch pvc for the other drain lines and the vents. What size are toilet waste drains. Waste drain pipes for toilets in modern plumbing systems are either 3 inches or 4 inches in diameter.

This is the home s main drain line the drain pipe connects to this pipe. Standard toilet rough in common rough in sizes the standard toilet rough in is 12. Main toilet drain or stack 4 inch pvc or iron pipe. However some homes may have a smaller drain pipe diameter.

The number of units on one drain pipe helps to calculate the size of pipe needed. The drain line leading from the closet bend to the drain stack is 4 inches in diameter. A toilet is considered as six units because of how much water it discharges at once. Local codes may call for a 4 inch main drain and some plumbers prefer to run larger vent pipes.

Check toilet to confirm location water supply connection. Measured from centerline running vertically through the center of the toilet supply line hole should be 6 inches to the side of centerline. Slope this pipe at 1 8 inch per foot grade to the main drain stack. 10 and 14 are also possible and you ll have a smaller selection of toilets that fit those sizes.

There are however other rough in sizes. Ideally 8 1 4 inches above the floor. The wider the pipe the more waste it can move and the. 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.

Most homes use a 4 inch drain pipe only high rises supporting more than 5oo appliances use a larger pipe size.