The first is a shut-off valve and the second is a screw valve.

One is a ball valve and the other is a spiral valve.

The ball valve is that there is a ball under the switch of the faucet, the ball is close to the wall of the faucet tube, and there is a circular hole on the ball, when the direction of the round hole is the same as the direction of the faucet tube, the water can pass through the round hole, when the switch is toggled, so that the direction of the round hole is different from the direction of the tube, the water flow becomes slower or stops.

The principle of the spiral valve is different from the ball valve, the spiral valve is actually a rubber plug valve, the faucet switch has a rubber stopper at the bottom, when the faucet is turned, the rubber stopper can move up and down, adjust the size of the water flow, when the faucet is tightened, the rubber stopper plugs the faucet, and the water cannot flow out.

A faucet is a valve that controls the flow of water. The replacement speed of the faucet is very fast, from the old cast iron process to the electroplated knob type, and then developed to the stainless steel single temperature single control, and now many families, the use of stainless steel double temperature double control faucet, but also the emergence of kitchen combination faucet. Now, more and more consumers choose to buy faucets, which will be considered comprehensively from many aspects such as material, function, and shape. The main raw material of the faucet is copper and zinc alloy. Usually hot faucets generally have a red indicator or symbol, while cold water faucets generally have a blue or green indicator or symbol. In native English-speaking countries, faucets are also often marked with an “H” or “C” for hot or cold. Most residential, commercial and industrial houses have a faucet in front of their doors, and they are equipped with a four-corner switch with an inner hole to avoid passers-by from using water indiscriminately.

There is also a kind of hot and cold water faucet: in fact, the hot and cold water faucet is also called “mixed faucet”, that is, the faucet that mixes cold water and hot water together and can adjust the water temperature. The principle is mainly to use a very high precision ceramic sheet or a steel spool inside the faucet to control the water outlet, so that when using the faucet, it is facing different directions. There is a distinction between cold and hot water.