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22
TROUBLESHOOTING – PUMP TUBE
NOTICE:
A leaking pump tube damages the metering pump. Inspect pump frequently
for leakage and wear. Refer to Tube Replacement section for additional safety
precautions and instructions.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Tube leaking
Pump tube ruptured
Replace pump tube, ferrules; center tube
Calcium or mineral deposits
Clean injection fitting, replace pump tube,
ferrules; center tube
Excessive back pressure
Verify system pressure against tube psi,
replace tube if needed
Tube is twisted
Replace pump tube, ferrules; center tube
Tube not centered
Replace pump tube, ferrules; center tube
Tube life is shortened
Chemical attack
Check chemical compatibility
Mineral deposits at injection point
Remove deposits, replace pump tube,
ferrules; center tube
Sediment blockage at check valve
Clean injection fitting, ensure suction
line is 2" above bottom of tank
Degraded check valve duckbill
Replace duckbill at every tube change
Duckbill in wrong orientation
Reverse duckbill orientation
Tube manually stretched or
Follow tube replacement instructions
pinched during replacement
and allow roller assembly to stretch tube
into place
Seized rollers caused abrasion on tube
Clean roller assembly or replace
Exposure to heat or sun
Do not store tubes in high temperatures
or in direct sunlight
Tube connection is leaking
Missing ferrule on 1/4" line
Replace ferrule
Crushed ferrule
Replace ferrule
Ferrule in wrong orientation
Reverse orientation of ferrule
