潛水泵、汙水泵,因為他們經常referred to, are a type of fluid transfer pump that is completely submerged into the liquid that it is designed to pump. With its hermetically sealed motor close coupled to the pump body, a submersible pump works by pushing the fluid to the surface rather than pulling it up. A benefit of the sump pump design is that because the pump is immersed in the liquid and the suction is flooded, pump cavitation is not an issue. It is much easier for a pump to pump or push a liquid than it is to suck or create a vacuum to draw liquid to the impeller.
根據泵送的流體或固體含量使用不同的葉輪類型。例如，如果潛水泵是處理汙水，則可以使用滅射固體或渦流葉輪以允許固體穿過泵的Macerator葉輪。
Single stage submersible pumps are commonly used in applications concerning:
水排水
汙水泵送
Slurry pumping
水轉印
Pond filters
Multistage submersible pumps however tend to be lowered down a borehole and utilised for:
Water extraction
Deep water well drilling
海上鑽井鑽機
Emergency deballasting
