What is a basin waste?

A basin waste, also known as sink waste or sink plug, is the passage or waterway in your washbasin.  This bathroom accessory, which is almost an afterthought, performs a useful function.  It allows water in the wash basin to run off to the main drain.

Basin wastes perform another function, too.  They allow you to fill your sink with water by blocking off that waterway.

Apart from its functional value, basin waste can also serve as a useful bathroom accessory to enhance your basin design.