Xylem IM126R02 E-Z Prime Jet Pump Shallow Well Jet Pump - Manual (Page 9)

9
Cause of Trouble How to Check How to Correct
1. System incompletely primed. When no water is delivered, check
prime of pump and well piping.
Re-prime if necessary.
2. 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.
3. Undersized piping. If system is low, the discharge piping
and/or plumbing lines may be
undersized.
Replace undersized piping or install
pump with higher capacity.
4. 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.
5. Leak on suction side of system. On shallow well units, install pressure
gauge on suction side.
Close the discharge line valve. Then,
using a bicycle pump or air
compressor, apply about 30 psi
pressure to the sytem. 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.
6. Low well level. Check well depth against
performance to make sure pump and
ejector are properly sized.
If undersized, replace pump or
ejector.
7. Low water level in well. Shut off pump and allow well to
recover. Restart pump and note
whether delivery drops after
continuous operation.
If well is “weak,” switch from shallow
well to deep well equipment.
8. 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.
9. 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.
E — PUMP OPERATES BUT DELIVERS LITTLE OR NO WATER.