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26
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 Identify and correct cause,
clean components of chemical &
replace tube according to instructions
Calcium or mineral deposits Clean injection fitting; replace tube and
duckbill according to instructions
Excessive back pressure Verify system pressure against tube psi,
replace tube if needed
Tube is twisted Replace tube according to instructions,
hold tube fitting while tightening
connecting nut to prevent twisting
Tube not centered Clean components of chemical,
replace tube according to instructions &
confirm tube is centered
Tube life is shortened Chemical attack Check chemical compatibility
Mineral deposits at injection point Remove deposits, replace pump tube
and duckbill according to instructions
Sediment blockage at check valve Clean injection fitting, ensure suction
line is 3" above tank bottom. Use
suction line strainer.
Degraded check valve duckbill Replace duckbill at every tube change
Duckbill in wrong orientation Reverse duckbill orientation
Seized rollers caused abrasion on tube Clean roller assembly or replace,
do not lubricate
Exposure to heat or sun DO NOT store tubes in high temperatures
or in direct sunlight
Tube connection is leaking Ferrules installed incorrectly, Replace ferrule, beveled end should face
missing or damaged the tube fitting
Crushed ferrule Replace ferrule
3/8" nut loose Secure adapter and tighten 3/8" nut
as needed
Missing ferrule in 3/8" adapter Replace with new adapter fitting or
insert new ferrule into adapter
Sleeve and/or plastic gripper inside Replace if damaged or missing/
3/8" connecting nut is missing Reorient if incorrectly assembled;
damaged, or incorrectly assembled gripper beveled end faces nut;
sleeve wider end faces gripper
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