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JET PUMP TROUBLESHOOTING E - PUMP OPERATES BUT DELIVERS LITTLE OR NO WATER |
| CAUSE OF TROUBLE | HOW TO CHECK | HOW TO CORRECT |
| Low line voltage | Use voltmeter to check at pressure switch or terminals nearest pump | If voltage under recommended minimum, check size of wiring from main switch on property. If OK, contact power company |
| System incompletely primed | When no water is delivered, check prime of pump and well piping | Re-prime if
necessary |
| Air lock in suction line | Check horizontal piping between well and pump. If it does not pitch upward from well to pump, an air lock may form | Rearrange
piping to eliminate air lock |
| Undersized piping | If system delivery is low, the discharge piping and/or plumbing lines may be undersized. Refigure friction loss | Replace
undersized piping or install pump with higher capacity |
| Leak in air volume control or tubing | Disconnect air volume control tubing at pump and plug hole. If capacity increases, a leak exists in the tubing of control | Tighten all
fittings and replace control if necessary |
| Pressure regulating valve stuck or incorrectly set (deep well only) | Check valve
setting. Inspect valve for defects |
Reset, clean
or replace valve as needed |
| Leak on suction side of system | On shallow well units, install pressure gauge on suction side. On deep well systems, attach a pressure gauge to the pump. Close the discharge line valve. Then, using a bicycle pump or air compressor, apply about 30 PSI pressure to the system. If the system will not hold this pressure when the compressor is shut off, there is a leak on the suction side | Make sure
above ground connections are tight. Then repeat test. If necessary, pull
piping and repair leak |
| Low well level | Check well depth against pump performance table to make sure pump and ejector are properly sized | If undersized,
replace pump or ejector |
| Wrong pump/ejector combination | Check pump and ejector models against manufacturer’s performance tables | Replace
ejector if wrong model is being used |
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Low well capacity |
Shut off pump and allow well to recover. Restart pump and note whether
delivery drops after continuous operation |
If well is “weak”, lower ejector (deep well), use a tail pipe (deep well) or switch from shallow well to deep well equipment |
| Plugged ejector | Remove ejector and inspect | Clean and reinstall if dirty |
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Defective or plugged foot valve and/or strainer |
Pull foot valve and inspect. Partial clogging will reduce delivery.
Complete clogging will result in no water flow. A defective foot valve may
cause pump to lose prime, resulting in no delivery |
Clean, repair or replace as needed |
| Worn or defective pump parts or plugged impeller | Low delivery may result from wear on impeller or other pump parts. Disassemble and inspect | Replace worn parts or entire pump. Clean parts if required |
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A-Pump will not start or run | B-Motor overheats | C-Frequent Starts and stops | D-Pump won't shut off | E-Little or no water delivered |
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