Mute pump is a very small noise miniature pump. Miniature pumps are equipped with one of the pumping out of the mouth, a drainage outlet, and at the entrance to continue to form a vacuum or negative pressure; drainage outlet to form a larger output pressure; working medium is water or liquid; a compact instrument. Micro-pumps are also called "micro-liquid pumps, micro-pump, mini-pump". Miniature pump noise not only from the work done by the motor, as well as water and wall friction noise, and now some micro-pump noise is quite small, the basic can be called a quiet pump. For example, in the mini self-priming water pump, the WKA series for water and gas, the CSP series for medium-flow, and the miniature submersible pump QZ series are all very small noise.