In order to ensure the normal use and life of the submersible sewage pump, regular inspection and maintenance should be carried out: 1. Replacing the seal ring: After the long-term use in the sewage medium, the gap between the impeller and the seal ring may increase, causing the pump flow rate and efficiency Drop, should be switched off the gate, the pump hoisted, remove the bottom cover, remove the seal ring, according to the actual size of the impeller port ring seal ring, the gap is generally about 0.5mm. 2, submersible sewage pump long-term need, should be cleaned and lifted in ventilated and dry place, pay attention to antifreeze. If placed in water, run at least 30 min every 15 days (do not dry) to check its function and suitability. 3, cable inspection at least once a year, if damaged please give replacement. 4, at least once a year inspection motor insulation and fastening screws, if the motor insulation down to find someone to repair, if the fastening screws loose, please re-tighten. 5, submersible sewage pump at the factory has injected the right amount of oil, used to lubricate the mechanical seal, the oil should be checked once a year. If you find water in the oil, it should be let go, replace the oil, replace the gasket, tighten the screw plug. After three weeks, it must be rechecked. If the oil becomes emulsion, the mechanical seal should be inspected and replaced if necessary. 6, submersible sewage pump operation failure, according to the given troubleshooting methods are excluded, if still can not be resolved, and can not determine the cause, do not indiscriminately disorganized chaos repair, should immediately find someone to repair.