Single-handle 2-hole faucet: means that the hot and cold water is introduced by two pipe holes, respectively, and the water is discharged by a water nozzle. The water temperature is adjusted by a handle to the left and right. Generally hot water on the left and cold water on the right. This type of valve is actually a common hot and cold mixing valve.
Double-handle 2-hole faucet: It means that the hot and cold water is introduced by two pipe holes respectively, and the water is controlled by two valves and one water nozzle. The water temperature is realized by two valve controls, and the water temperature is easier to control. There are fewer practical applications.
Kitchen faucet, I recommend to choose a single handle, and it is best to choose a faucet handle longer, because in the kitchen, we insist on holding something else in the hand, or the hand is oily, this time the faucet can be switched by the back of the hand It seems a lot easier.
Shower faucet, if you are using a gas water heater at home, it is convenient to choose a double faucet. Although many gas water heaters are now constant temperature, because everyone in the family feels differently, it is still necessary to use faucet mixed water. Perform fine-tuning of the temperature.
Ordinary single handle faucet, when adjusting, is the change of the water volume of the hot water pipe and the cold water pipe, it is difficult to master, and it is convenient to use the double faucet, as long as the hot water faucet is opened to the maximum, then the cold water tap is opened. It is ok to the right amount, and for some water heaters without a low-pressure start, since the water volume of the hot water pipe is always open to the maximum, there is no phenomenon that the water heater extinguishes when the water temperature is adjusted.
The single faucet is easy to open, and the advantage of the double faucet is that the adjustment of the hot and cold water is convenient, so the single handle is suitable for the kitchen, and the double handle is suitable for the bathroom.