Standard Kitchen Sink Drain Pipe Size

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.

Standard kitchen sink drain pipe size.

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. This pipe is the standard size for all kitchen sinks. 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. However most of the bathroom sinks use 1 inch drain pipe.

When installing a new kitchen sink drain or repairing an old leaking one you need a particular size drainpipe. The main sewer pipe leading to the septic tank or public sewer is usually 4 inches. Since all kitchens use this size of pipe it is best to stick with it during any repair. This size is precisely the diameter of the pipe instead of the length.

A 2 inch sink strainer fits the standard bar sink drain. These drains like bathroom and kitchen drains use a p trap which is a j shaped pipe that connects to the main drain line. Drains connect to either a 1 1 4 inch or 1 1 2 inch tail pipe. Every state may have different code on plumbing and it may affect the required size of the bathroom sink pipe.

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