How do you install double sink plumbing?
What size is a kitchen sink drain pipe?
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. All the pipes that connect to the tailpiece, including the P-trap assembly and all the horizontal extensions, are either 1 1/4 or 1 1/2 inches in diameter.
Are sink and toilet pipes connected?
Sinks, showers, hand basins, laundry tubs and toilets have metal or plastic pipes joined to them which go outside and connect into the sewage system under the ground. Older plumbing systems may have earthenware (clay) pipes. The sewer pipe is the pipe which carries the sewage to the disposal system.