Water Pump Failures Causes And Methods
| Failure | Possible Causes | Methods |
| 1.Pump not suck water, both pointers of manometer and vacuometter severly jump. | a:Water input the water pump is not enoughb:Air leakage on water input pipes and instruments | a:Input more water into water pumpb:Tighten and block the air leakage parts |
| 2.Pump not suck water, high vacuum shown on vacuometer | a:Bottom valve not opened or blocked upb:Too large resistance of the suction pipelinec:too high suction height | a:adjust or replace bottom valveb:clean or replace water input pipesc:reduce water input height |
| 3.No water out through pressure is shown on manometer | a:too large resistance on outlet pipelineb:Uncorrect rotating directionc:Impeller blocked up d:Insufficient rotating speed
| a:clean or shorten water pipeb:clean rotation direction of motor c:clean impellerd:increase rotation speed of water pump |
| 4.Pump flow rate reduced or pump lift drops | a:impellers or piprs are jammedb:too serious abrasion on seal rings or impellersc:rotation speed is too low | a:clean impellers and pipesb:replace damaged partsc:adjust to rate rotation speed |
