Standard Sink Drain Pipe Size

When installing a new kitchen sink drain or repairing an old leaking one you need a particular size drainpipe.

Standard sink drain pipe size.

This pipe is the standard size for all kitchen sinks. Vertically both are about 2 to 3 inches above the drain pipe supply lines horizontal. 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. Compare the fixture to the minimum sizes of drainage pipe by fixture table.

More on venting a toilet here. 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. Sizing individual plumbing vents. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter.

Don t get confused with the hole size and the actual pipe size. Since all kitchens use this size of pipe it is best to stick with it during any repair. It provides the right amount of flow to drain a kitchen sink during heavy use. This size is precisely the diameter of the pipe instead of the length.

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. However most of the bathroom sinks use 1 inch drain pipe. About 16 to 20 inches above the floor. The standard size and setting.

The minimum toilet vent size depends on your plumbing code. A standard rule of thumb is that sewer pipes leading away from a toilet are 3 inches in diameter. 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. Every state may have different code on plumbing and it may affect the required size of the bathroom sink pipe.

Flush bushings kind of look like hockey pucks. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. 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. 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.

Sink rough in details. Other is 4 inches to left of centerline discharge hole vertical. Consider drain pipe to be the vertical centerline. 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. All the pipes that connect to the tailpiece including the p trap assembly.