When the submersible pump enters the water, it will cause the motor to be short-circuited. Therefore, before use, the various seals of the submersible pump must be inspected. It is found that the looseness should be tightened in time. If the seal is damaged, replace the new one in time. After every 50 hours of operation, the submersible pump should be grounded and the seals checked to ensure safe use.