Recommendation Minimum Pipe Size For Toilet Drain
6 b with direct flush valve.
Minimum pipe size for toilet drain. Toilet Rough-In Details. Ideally 8 14 inches above the floor. 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.
But as far as the pipe or standard size PVC for sink drain is concerned its 2 or 3 ½ inches in diameter. First figure out the diameter of the pipe you are working with. 1 inch 254 mm 1 inch per foot 833 mmm.
All the fixtures in your house will connect to a main drain line which is usually 4 in diameter. Measured from centerline running vertically through the center of the toilet supply line hole should be 6 inches to the side of centerline. The hot line and cold line are spaced 8 inches apart from left to right.
BUILDING DRAINS AND SEWERS For SI. Slope this pipe at 18 inch per foot grade to the main drain stack. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack.
Moving over to the toilet. Toilet Drain Pipe 3 inch PVC or 4 inch PVC pipe. Regardless of your plumbing code the minimum drain size for a toilet is 3 inches.
Bathroom group a with flush tank. Hydraulic Load fixture units 1. Fixture unit load values for drainage and vent piping shall be computed from Table 7021 and Table 7022 2.