水泵一般在进水管底部领有底问，否则就要装抽气装置。底闻在使用过程中经常发生漏水或被脏物卡住，此外盘根处漏水漏气也能引起水泵开车时的麻烦。为此，在水泵进水管处加装了一个三通，其一端接吸水端，一端接出水回水管（图1）。利用管中存水压力经咳喘产生压力水，另一端接 Pumps generally have the bottom end of the inlet pipe asked questions, otherwise it is necessary to install suction device. At the end of the smell in the course of frequent leakage or dirt stuck, in addition to packing leaks can cause pump trouble when driving. For this purpose, a tee is installed at the water inlet of the pump, one end of which is connected to the water suction end and the other end of the water return pipe is connected to the water return pipe (FIG. 1). The use of tube water pressure generated by cough pressure water, the other end