| 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
|
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 |
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 |