Well submersible pump can not be normal backwater reasons

A customer consultation: home more than 20 meters deep well submersible pump, head 40 meters, a few days ago because the water pipe off the pump, to put up a good re-plug. Can be re-placed in the well, the water is very mixed, must have stirred the following sediment. Pumping after the closure of the submersible pump was found in the water pipe does not go down, not far from the exit of the park. And so on for a while or do not drop, so they open the well submersible pump pumping some, repeated several times, the water down. Can be pumping the next day when the water does not occur back to the situation, sometimes repeated pumping several times to drop the water, and sometimes no matter what. Now is the winter, very worried that the water pipe was frozen at night. Then the water will become a problem.
Shanghai weihu Pump Co., Ltd. recommends that you: Now a lot of well submersible pumps are comes with a check valve, you said the situation is the occasional check valve work occasionally does not work. Once again into the well, out of the water is very mixed, presumably stirring the following sediment. Is a normal phenomenon. If your land is a cold area, then you really need to transform your pump about, the submersible pump check valve is actually a piece of rubber skin, removed on it, the pump power, the water inside the pipe will be natural Down, and the water level of wells.