1. not primed | 1. fill pump with clean liquid and restart |
2. air leaks at suction line | 2. use 6 to 10 wraps of teflon tape or liquid teflon on all pump port fittings 2. fittings should be hand tight plus one full turn 2. replace any torn or damaged suction lines 2. check for worn gasket in suction hose coupling |
3. motor or engine RPM's or horsepower are not correct | 3. compare pump requirements with data on engine or motor 3. be sure engine is off the idle setting |
4. internal damage or worn parts | 4. open pump end and inspect, replace worn parts |
5. high suction lift | 5. place pump as close to liquid as possible, max lift is 25 feet at 3,800 RPM 5. keep suction line length under 25 feet, industry standard is 20 feet 5. high elevation and high temperature can reduce suction lift |
6. too fine of strainer or filter on suction line | 6. properly size strainer/filter to ensure adequate flow to suction port |
7. obstruction in suction line or impeller | 7. clean suction line or strainer, make sure lines are clear and valves open 7. open pump end and inspect, remove debris from impeller area |
8. motor wired incorrectly, incorrect rotation | 8. have electrician check wiring |