射流真空系统是用水泵抽水箱的水，送至10m以上的真空罐内，射流泵的喷嘴高速喷射，吸取真空系统内的空气与水，代替真空系。由于节水节电，维修方便，运行可靠，深受用户欢迎。就能源利用来讲，真空罐至水箱约10m的值能被浪费。笔者研制的双水泵是将一台水轮机与一台水泵连在 Jet vacuum system is the pump tank water, sent to 10m above the vacuum tank, jet pump nozzle high-speed jet, draw the vacuum system of air and water, instead of the vacuum system. Due to saving water and electricity, easy maintenance, reliable operation, welcomed by users. In terms of energy use, a value of about 10 m from the tank to the tank can be wasted. The double pump developed by the author is connected with a water pump and a water pump