Standard Sink Drain Pipe Size

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.

Standard sink drain pipe size.

The standard size and setting. However most of the bathroom sinks use 1 inch drain pipe. Don t get confused with the hole size and the actual pipe size. Flush bushings kind of look like hockey pucks.

It provides the right amount of flow to drain a kitchen sink during heavy use. To connect the appropriate size vent into the hub of the 3 sanitary tee you ll need a flush bushing. Inside the pipe there should be 1 inches hole. Sizing individual plumbing vents.

For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. 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. The most common size of the drainage hole in a bathroom sink is 1 1 4 inches in diameter although you may also find some with a diameter of 1 1 2 inches or more. This size is precisely the diameter of the pipe instead of the length.

Every state may have different code on plumbing and it may affect the required size of the bathroom sink pipe. Compare the fixture to the minimum sizes of drainage pipe by fixture table. Although most bathroom sink drain holes are similar in size to coordinate with the drains and plumbing used with the sinks themselves there is no single standard size for them. The inlet must match the supply pipe and it can be a 1 2 inch female pipe thread fpt connector for galvanized pipes a 1 2 inch compression or sweat connector for.

Sink rough in details. Vertically both are about 2 to 3 inches above the drain pipe supply lines horizontal. 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. All the pipes that connect to the tailpiece including the p trap assembly.

This pipe is the standard size for all kitchen sinks. Consider drain pipe to be the vertical centerline. The minimum toilet vent size depends on your plumbing code. The 1 2 inch supply pipes that come to the sink each terminate with a shutoff valve and this valve is one of the two factors that determine the connector size on the faucet hose.

Other is 4 inches to left of centerline discharge hole vertical. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. About 16 to 20 inches above the floor. A standard rule of thumb is that sewer pipes leading away from a toilet are 3 inches in diameter.

In the ipc toilet vents are 1 5 in the upc it s 2 inches. One hole is 4 inches to the right of centerline.