Sink Drain Pipe Size

A standard rule of thumb is that sewer pipes leading away from a toilet are 3 inches in diameter.

Sink drain pipe size.

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. 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. The fourth size is 3 inch drain pipe that can be connected to 20 units in horizontal stack and 30 units in vertical stack.

This is the minimum size to use for building sewer or drain pipe that is connected to the toilet. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack. Consider drain pipe to be the vertical centerline. Vertically both are about 2 to 3 inches above the drain pipe supply lines horizontal.

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. The drainpipe threads onto this pipe with a connector. All the pipes that connect to the tailpiece including the p trap assembly. Stack diameters shall not be reduced to less than one half of the diameter of the largest stack size.

Compare the fixture to the minimum sizes of drainage pipe by fixture table. 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. About 16 to 20 inches above the floor.

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. Since the pipe is 1 1 2 inch in diameter kitchen drainpipes are also 1 1 2 inches in diameter. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. Inside the pipe there should be 1 inches hole.

Other is 4 inches to left of centerline discharge hole vertical. The drain has a threaded pipe sticking out below the lock nut that secures the drain to the sink basin itself. One hole is 4 inches to the right of centerline. Sink rough in details.