Low flow rate; low
pressure in filter
Low flow rate; high
pressure in the filter
Basket or impeller clogged
Air getting into the suction
pipe
Delivery pipe choked
Pump filter clogged
Clean pump filter
Straighten the pipe
Prime suction pipe
Clean basket or impeller
Wrong impeller fitted
Wrong capacitor fitted
Mechanical overload from
poor quality bearings or
impeller or diffuser blocked
with grass or other solids
Clean the diffuser
The pump is not priming
properly
Pump is installed too high
above water level of the
pool
Sucking air
Diffuser incorrectly fitted
inside pump
Fit a spring loaded non return valve into
suction line coming up from underground
before entering pump
Replace the impeller
Replace the capacitor
Replace bearings and impellers
Diffuser blocked by debris
Prime the suction pipe
Correct the diffuser fitting
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