Causes for common failures in self-priming pumps and their solutions

Shanghai Weihu submersible pump manufacturers has always been trying to be helpful for clients with problems in water pumps. Recently, an e-pal asked for the methods of solving common problems in self-priming pumps. To solve the problems, we must know what causes these problems. Weihu Pump here will say something about the causes for common failures in self-priming pumps and their solutions.

Why the self-priming pump sends out no water?

It is probably because the self-priming pump doesn’t have enough storage of water inside; the connection of water inlet pipes leak water; suction head lift too high; rotation speed too low. The solution is to add more water into the pump, replace the sealing ring, bring down the suction head, or increase the rotation speed.

Why does the self-priming pump can’t provide enough water?

It may be because the filter screen of water inlet pipe or the impellers of the self-priming pump is clogged; lift too high or rotation speed too low; water leakage in the ring of impellers. The solution is to clean off the clogging stuff in filter screen or impellers, bring down the lift or increase rotation speed, change the sealing at the ring.

Why does the water discharge pipe leaks?

It is probably because the sealing ring in the pipe connection is worn out or cracked, or there are dirty stuff on the connections. The solution is to change the sealing ring, clean off the dirty stuff on the connections and the connecting surface.

Shanghai Weihu submersible pump manufacturers has been producing self-priming pumps for over 30 years. Except for self-priming pumps, we also produce sewage pump, inline pump, submersible pump, axial flow pump and so on. Please feel free to contact us if you are interested in our pumps.