Most water pumps used in northern tap water systems are self-priming pumps, which are prone to freezing in winter. In this case, we should take the following measures to maintain the pumps. 1. Empty the water in the pump and add water when in use. Prevent the pump freeze-frozen pump. 2. If the pump is freezing, pour hot water or boiling water into the pump to internalize the ice. Or heat pump housing. 3. Use downhole pump. The pump into the underground, the general underground pump deep from the ground, will not freeze. 4. Insulation using water pump. Add insulation layer to steam or hot water. To prevent water pump freezing. 5. Non-self-priming centrifugal pump. When used, add water. 6. Place the pump in a normal temperature environment. Below zero can be. The following six note for the winter pump. To a lot of maintenance to prevent cracking of the pump, shorten the life of the pump.