How to inspect submersible pumps that have not been used for a long time?

Submersible pumps are widely used. Families can pump water to water gardens and vegetable gardens, factories can use them to transport rainstorm water, and government units such as municipal engineering can use a variety of submersible pump products.
If a submersible pump is purchased and not used for a long time, or if it is used again after a long period of stagnation, a series of inspections are required to prevent damage to the pump. Firstly, inspect the appearance of the submersible pump for wear and defects in the paint. If the damaged parts of the pump body affect normal use, corresponding components need to be replaced, especially to prevent electric leakage. The submersible pump needs to check whether the cable of the pump is intact and whether the insulation level meets the standard. Use an ohmmeter to check the resistance between the two pins of the submersible pump wire. If the resistance is very high or shows an open circuit, it may be because the power cord is faulty, the contact inside the motor housing is faulty, or the motor coil is faulty..
Submersible pumps are relatively simple products. Choosing the right parameters and materials, and paying attention to their maintenance during normal use can greatly extend their service life.