Low
Capacity |
| Possible
Causes | |
What To Do
| |
|
Pump speed too slow/wrong electric motor | |
Check the RPM of the electric motor. |
|
|
| Low voltage |
| Check motor speed. |
|
|
Differential pressure too high | |
Restriction in discharge piping/hose, or increase their sizes. |
|
|
Vapor lock |
| Regenerative turbine pumps
"vapor-lock" when reaching their maximum differential pressure capability. See
Differential pressure too high. Piping installed improperly. See Installation
Guide. |
|
|
Bypass valve stuck open or set too low |
| Check capacity with by-pass
line closed using manual valve. Re-adjust, repair or replace valve. |
|
|
Clogged strainer |
| Clean strainer. |
|
|
Suction pipe too small or restricted |
| Indicated by pump inlet
pressure dropping several pounds when pump is started. Remove restriction and/or
increase pipe size. |
|
|
Worn impeller |
| Replace impeller. |
| |
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