Sink Drain Pipe Size

The replacement of building sewer and building drain piping by pipe bursting methods shall be limited to gravity drainage piping of sizes 6 inches 152 mm and smaller.

Sink drain pipe size.

Stacks shall be sized based on the total accumulated connected load at each story or branch interval as the total accumulated connected load decreases stacks are permitted to be reduced in size. 1 inch 25 4 mm. The drain has a threaded pipe sticking out below the lock nut that secures the drain to the sink basin itself. But as far as the pipe or standard size pvc for sink drain is concerned it s 2 or 3 inches in diameter it s the measurement that surrounds the center of the drain from both sides.

A standard rule of thumb is that sewer pipes leading away from a toilet are 3 inches in diameter. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. One hole is 4 inches to the right of centerline.

Sink rough in details. Stack diameters shall not be reduced to less than one half of the diameter of the largest stack size. The fourth size is 3 inch drain pipe that can be connected to 20 units in horizontal stack and 30 units in vertical stack. Don t get confused with the hole size and the actual pipe size.

Sewer drains from laundry sinks or washing machines are 2 inches in diameter and those from sinks in the kitchen bathroom or powder room generally use a 1 5 inch pipe. Inside the pipe there should be 1 inches hole. The drainpipe threads onto this pipe with a connector. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack.

Compare the fixture to the minimum sizes of drainage pipe by fixture table. Some older sinks may have drains that connect to a 1 1 4 inch tailpiece but most modern drains have a 1 1 2 inch outlet. About 16 to 20 inches above the floor. This is the minimum size to use for building sewer or drain pipe that is connected to the toilet.

Other is 4 inches to left of centerline discharge hole vertical. Vertically both are about 2 to 3 inches above the drain pipe supply lines horizontal. Since the pipe is 1 1 2 inch in diameter kitchen drainpipes are also 1 1 2 inches in diameter. The replacement piping shall be of the same nominal size as the existing piping.