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A faucet is a tool for delivering water from a plumbing related system. It could consist of the following components: spout, handle(s), lift pole, cartridge, aerator, mixing up chamber, and normal water inlets. When the handle is turned on, the valve opens and regulates this movement modification under any temperature or drinking water condition. The faucet person is usually made of brass, though die-cast zinc and chrome-plated plastic are also used.

The majority of domestic faucets are solo or dual-control cartridge faucets. Some single-control types use a plastic or metal core, which operates vertically. Others use a metallic ball, with spring-loaded rubber seals recessed in to the faucet body. The less expensive dual-control faucets contain nylon cartridges with rubber seals. Some faucets have a ceramic-disc cartridge that is much more durable.

Faucets must comply with water conservation regulations. In the United States, shower basin faucets are actually limited by 2 gal (7.6 L) of water per minute, while shower and tub faucets are limited to 2.5 gal (9.5 L).

Faucets run an average of eight minutes per capita per day (pcd), relating to a study by the American Water Works Association Research Basis completed in 1999 that was based on drinking water use data gathered from 1,188 residences. In daily pcd use indoor drinking water use was at 69 gal (261 L), with faucet use third highest at 11 gal (41.6 L) pcd. In residences with water-conserving fixtures, faucets moved up to second at 11 gal (41.6 L) pcd. Tap use was related to household size. The addition of teens and adults increases water use. Sink use is also negatively related to the amount of persons working outside the home and is leaner for individuals who have an programmed dishwasher.The developing process for faucets is becoming automated highly, with computers controlling most of the machines. Productivity and efficiency have thus upgraded over the years.

Output and efficiency have improved over the years. The essential process includes forming the main body of the faucet (some-times including the spout if no swivel is needed), applying a finish, and then assembling the many components, followed by presentation and inspection. The faucet industry has also been impacted by environmental regulations, that have required special processes to be developed.