Kitchen Sink Drain Pipe Size

A single trap can service more than one sink but adjacent drains cannot be farther apart than 30 inches.

Kitchen sink drain pipe size.

For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. The kitchen drainpipe connects to the drain under the sink. The horizontal pipes connect to the trap with a double wye tee which has two y shaped inlets and one outlet. A 2 inch sink strainer fits the standard bar sink drain.

However with vertical drain stack this drain pipe size can handle up to two units connection well too. The drain has a threaded pipe sticking out below the lock nut that secures the drain to the sink basin itself. The drainpipe threads onto this pipe with a connector. Compare the fixture to the minimum sizes of drainage pipe by fixture table.

These drains like bathroom and kitchen drains use a p trap which is a j shaped pipe that connects to the main drain line. All the pipes that connect to the tailpiece including the p trap assembly. Unlike drain pipe on the shower or tub that will be connected to two units this sink drain pipe will be connected to only one unit on the drain line. Horizontal drain pipes connecting the sink drains to the trap must have a minimum slope of 1 4 inch per foot toward the trap.

Kitchen sink is commonly connected up to two units or three units for one with disposer.