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A faucet is a device for delivering normal water from a domestic plumbing system. It can consist of the following components: spout, handle(s), lift fishing rod, cartridge, aerator, mixing up chamber, and drinking water inlets. When the handle is turned on, the valve opens and control buttons the water flow modification under any water or temperature condition. The faucet body is constructed of brass, though die-cast zinc and chrome-plated plastic are also used.

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

Faucets must adhere to water conservation regulations. In america, bath basin faucets are actually limited to 2 gal (7.6 L) of normal water per minute, while tub and shower faucets are limited to 2.5 gal (9.5 L).

Faucets run typically eight minutes per capita each day (pcd), relating to a report by the North american Water Works Relationship Research Base completed in 1999 that was based on drinking water use data gathered from 1,188 residences. In daily pcd use indoor normal 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 accessories, faucets transferred up to second at 11 gal (41.6 L) pcd. Faucet use was strongly related to household size. The addition of teens and adults increases water use. Tap use is also adversely related to the number of persons working outside the home and is leaner for many who have an automated dishwasher.The developing process for faucets is becoming computerized highly, with computers managing most of the machines. Output and efficiency have thus advanced over time.

Efficiency and efficiency have better over time. The basic process contains forming the key body of the faucet (some-times including the spout if no swivel is needed), applying a finish, and assembling the various components then, accompanied by inspection and packaging. The faucet industry has also been impacted by environmental regulations, that have required special processes to be developed.