Standard Sink Drain Pipe Size

It provides the right amount of flow to drain a kitchen sink during heavy use.

Standard sink drain pipe size.

About 16 to 20 inches above the floor. The minimum toilet vent size depends on your plumbing code. Sink rough in details. In the ipc toilet vents are 1 5 in the upc it s 2 inches.

More on venting a toilet here. 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. When installing a new kitchen sink drain or repairing an old leaking one you need a particular size drainpipe. All the pipes that connect to the tailpiece including the p trap assembly.

Since all kitchens use this size of pipe it is best to stick with it during any repair. To connect the appropriate size vent into the hub of the 3 sanitary tee you ll need a flush bushing. 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. Consider drain pipe to be the vertical centerline.

This size is precisely the diameter of the pipe instead of the length. Flush bushings kind of look like hockey pucks. Don t get confused with the hole size and the actual pipe size. One hole is 4 inches to the right of centerline.

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

This pipe is the standard size for all kitchen sinks. 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. Vertically both are about 2 to 3 inches above the drain pipe supply lines horizontal. 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.

For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. Sizing individual plumbing vents. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. Compare the fixture to the minimum sizes of drainage pipe by fixture table.

Other is 4 inches to left of centerline discharge hole vertical. However most of the bathroom sinks use 1 inch drain pipe.