The faucet is the popular name for the water valve, which is used to control the size of the water flow and has the effect of saving water. The replacement of faucets is very fast, from the old cast iron process to the electroplated knob type, and then to the stainless steel single temperature single control faucet, the stainless steel double temperature double control faucet, and the kitchen semi-automatic faucet. Now, more and more consumers buy faucets, and they will comprehensively consider materials, functions, shapes and other aspects. Modern taps often have aerators at the tip to limit water flow and introduce air in the form of bubbles to reduce splashing. Without an aerator, water usually flows out of the tap in one big stream. An aerator spreads the water flow into many small droplets. In sanitary settings such as hospitals or laboratories "laminar flow devices" are used in place of aerators. Laminar flow devices restrict flow and direct the water into a smooth stream without introducing the surrounding air which could contain hazardous bacteria or particles. Modern bathroom and kitchen taps often use ceramic or plastic surfaces sliding against other spring-loaded ceramic surfaces or plastic washers. These taps exploit the uniquely low value of the coefficient of friction of 2 ceramic surfaces in contact, especially in the presence of water as a lubricant. These taps tend to require far less maintenance than traditional globe valves, and when maintenance is required the entire interior of the valve is usually replaced, often as a single pre-assembled cartridge.

According to the material, the faucet can be divided into stainless steel kitchen faucet, cast iron, all-plastic, brass kitchen faucet, zinc alloy material faucet, polymer composite material faucet and other categories. According to the function, it can be divided into basin, bathtub, shower, kitchen sink faucet and electric hot water faucet (porcelain energy electric hot water faucet) that becomes more and more popular. According to the structure, it can be divided into several types of faucets such as single type, double type and triple type. Also there is a single hole kitchen faucet. The single type can be connected to a cold water pipe or a hot water pipe; the double type can be connected to two hot and cold pipes at the same time, which is mostly used in the faucet of the bathroom vanity and the kitchen sink with hot water supply; the triple type can be connected to two hot and cold pipes. In addition to the pipe, it can also be connected to the shower head, which is mainly used for the faucet of the bathtub. The single handle faucet can adjust the temperature of cold and hot water with one handle, while the double handle needs to adjust the cold water pipe and the hot water pipe respectively to adjust the water temperature.

A shower is a place in which a person bathes under a spray of typically warm or hot water. Indoors, there is a drain in the floor. Most showers have temperature, spray pressure and adjustable showerhead nozzle. The simplest showers have a swivelling nozzle aiming down on the user, while more complex showers have a showerhead connected to a hose that has a mounting bracket. This allows the showerer to hold the showerhead by hand to spray the water onto different parts of their body. A shower can be installed in a small shower stall or bathtub with a plastic shower curtain or door. Showering is common in Western culture due to the efficiency of using it compared with a bathtub. Its use in hygiene is, therefore, common practice. A shower head is a perforated nozzle that distributes water over solid angle a focal point of use, generally overhead the bather. A shower uses less water than a full immersion in a bath. Some showerheads can be adjusted to spray different patterns of water, such as massage, gentle spray, strong spray, and intermittent pulse or combination modes. Hard water may result in calcium and magnesium deposits clogging the head, reducing the flow and changing the spray pattern. For descaling, various acidic chemicals or brushes can be used or some heads have rubber-like jets that can be manually descaled. A homemade remedy is to immerse it in a solution of water and vinegar for a while, since the vinegar is able to dissolve limescale. Some governments around the world set standards for water usage and regulate shower heads. For example, in the United States, residential and most commercial shower heads must flow no more than 9.5 litres (2.1 imp gal; 2.5 US gal) per minute per the Department of Energy ruling 10 CFR 430. Low-flow shower heads that have a water flow of equal or less than 7.6 litres (1.7 imp gal; 2.0 US gal) per minute (2.0 gallons per minute), can use water more efficiently by aerating the water stream, altering nozzles through advanced flow principles or by high-speed oscillation of the spray stream. The US EPA administers a voluntary water saving program, WaterSense, which can certify low-flow shower heads.

A bathroom faucet is a faucet installed in a washroom or bathroom. As far as faucets are concerned, copper has long been the first choice material, mainly because the antibacterial effect of copper medium has long been recognized by authoritative laboratories. Most of the high-end bathroom brands choose copper as the body of the faucet, and it has become an inevitable trend that other materials are eliminated. The quality of the electroplating surface is the most intuitive manifestation of the quality of the faucet. The surface electroplating is mainly nickel and chromium, so that it can achieve a smooth and bright effect. Good quality faucets will go through numerous tests, such as salt spray test, water test, gas test, etc., to ensure the durability of the faucet. The faucet that has been electroplated with high precision is basically durable, and more importantly, its surface gloss is good and it feels comfortable. Some high-end faucet surfaces also have other different treatment technologies, such as stainless steel surface and satin. Touchless bathroom faucets are a great option. Extendable showerheads can increase the effective radius of the faucet, adding more functional possibilities, and both sinks and containers can be filled faster. In order not to make unpleasant sounds, metal pipes should be avoided as much as possible.

Thermostatic shower is another name for shower thermostatic faucet, also known as thermostatic shower faucet or thermostatic mixer shower. In the family, there are generally four places to use the hot and cold water mixing faucet: the kitchen, the wash basin, the bathtub, and the shower room. Among them, because the mixed warm water used in the shower is directly sprayed on the body of the person through the shower, maintaining a constant temperature can greatly improve the safety and comfort of the shower. The use of a thermostatic mixing faucet with a shower head can achieve this purpose. The standard thermostatic shower faucet has a knob on the left and right, and the knob on the left adjusts the water temperature: if you turn it forward, the water temperature will drop; if you turn it backward, the water temperature will rise, but it will not turn when it reaches 40°C. This is because it is easy to burn the skin when the water temperature exceeds 40°C. If you need hot water with a higher water temperature, you must press and hold the red safety button on the knob before you can continue to screw it back. The knob on the right controls the water outlet method and water volume: when the scale is aligned, it is in a closed state; screw it forward, the water outlet nozzle below will flow out, and the more you screw it forward, the larger the water volume; if you screw it backward, the shower will flow out, and the further you screw it back, the more water volume will flow.

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