Recommendation Toilet Drain Pipe Size

Sizing Drainpipes Use this chart to count the number of fixture units that will be connected to a drain line and for the minimum drainpipe size.

Toilet drain pipe size. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack. Toilet Drain Pipe 3 inch PVC or 4 inch PVC pipe. Toilet Rough-In Details.

Slope this pipe at 18 inch per foot grade to the main drain stack. The drain pipe connects to the flange which mounts the toilet itself and this flange is usually built to connect to 3-inch schedule 40 toilet drain pipe. Since 3 inch pipe is generally connected to the end of the closet bend most closet bends have at least one 3 inch diameter connection.

So looking at the toilet make sure there are at least 15 inches of clearance from the center of the toilet to any adjacent fixture or wall. SLOPE OF HORIZONTAL DRAINAGE PIPE For SI. The wider the pipe the more waste it can move and the less likely it will be to clog.

From there it changes to a 4 inch pipe and goes to the. The 43 is an indication of two diameters. 7042 Reduction in Pipe Size in the Direction of Flow.

Main toilet drain or stack 4 inch PVC or iron pipe. Measured from centerline running vertically through the center of the toilet supply line hole should be 6 inches to the side of centerline. The Toilets Drain Size.

Check toilet to confirm location water supply connection. A 4-inch pipe for a toilet is recommended and can carry about twice the waste of a 3-inch drain. 1 inch 254 mm 1 inch per foot 8333 mmm.