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lci1.com 574-537-8900 CCD-0001763 Rev: 08.07.18
Flow Max
™
12V DC
Fluid Pump by Duraself
Installation and Owner’s Manual
(For Aftermarket Application)
What's Happening? What Should Be Done?
Pump will not start/
Blows circuit
Check electrical connections, fuse or breaker, main switch and ground connection.
Is voltage present at switch?
Check charging system for correct voltage (+ or - 10%) and good ground.
Check for an open or grounded circuit, motor or improperly-sized wire.
Check for seized or locked diaphragm assembly—water frozen?
Motor runs)
Check if the strainer is clogged with debris.
Check if there is water in the tank or whether air has collected in the hot water heater.
Check proper voltage with the pump operating: + or - 10%
Check pump housing for cracks or loose drive assembly screws.
Rapid Cycling
Runs When Faucet
Closed
Check output side (pressure) plumbing for leaks and inspect for leaky valves or toilet.
Check for trapped air in outlet side (water heater) or pump head.
Check for correct voltage to pump (+ or - 10%).
Check for loose drive assembly or pump head screws.
Check if the valves or internal check valve is held open by debris or if the rubber is swollen.
Noisy or Rough
Operation
Check plumbing, which may have vibrated loose.
Check if the pump is plumbed with rigid pipe, causing noise to be transmitted.
Does the mounting surface amplify the noise? Check for loose mounting feet or if mounting
feet are compressed too tightly.
Check for loose pump head to motor screws. There are three long screws.
Leaks From Pump Head
or Switch
Check for loose screws at the switch or pump head.
Check if the switch diaphragm is ruptured or pinched.
Check for punctured pump diaphragm if water is present in the drive assembly.
Troubleshooting chart
Vibration caused by driving, sea conditions or transporting can loosen plumbing, strainers and pump hardware.
Check for loose system components. Many symptoms can be resolved by tightening hardware. Refer to the chart for
troubleshooting tips.
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