Garbage disposal unit

A garbage disposal unit (also known as a garbage disposal, waste disposal unit, garbage disposer, or in Canadian English a garburator) is a device, usually electrically powered, installed under a kitchen sink between the sink's drain and the trap. The disposal unit shreds food waste into pieces small enough—generally less than 2 mm (0.079 in)—to pass through plumbing.

Garbage disposal units are used extensively in United States households, but are far less common elsewhere.

The garbage disposal was invented in 1927 by John W. Hammes, an architect working in Racine, Wisconsin. He applied for a patent in 1933 that was issued in 1935. His InSinkErator company put his disposer on the market in 1940.

Hammes' claim is disputed, as General Electric introduced a garbage disposal unit in 1935, known as the Disposall.

In many cities in the United States in the 1930s and the 1940s, the municipal sewage system had regulations prohibiting placing food waste (garbage) into the system. InSinkErator spent considerable effort, and was highly successful in convincing many localities to rescind these prohibitions.

Many localities in the United States prohibited the use of disposers. For many years, garbage disposals were illegal in New York City because of a perceived threat of damage to the city's sewer system. After a 21-month study with the NYC Department of Environmental Protection, the ban was rescinded in 1997 by local law 1997/071, which amended section 24-518.1, NYC Administrative Code.

In 2008, the city of Raleigh, North Carolina attempted a ban on the replacement and installation of garbage disposals, which also extended to outlying towns sharing the city's municipal sewage system, but rescinded the ban one month later.

In the U.S. some 50% of homes had disposal units as of 2009, compared with only 6% in the United Kingdom and 3% in Canada.

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