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PROBLEM
POSSIBLE CAUSE
SOLUTION
Excessive pressure
Small spray nozzle
Nozzle must be properly sized for the rated flow and pressure. Reset unloader or pressure relief
if nozzle size is changed.
Faulty pressure gauge
Check the pressure gauge using a properly calibrated pressure gauge on quick connects at the
equipment outlet.
Improperly adjusted unloader
Adjust to the proper pressure using pressure gauge.
Faulty unloader
Check the unloader action. If it is not working properly, it may need repaired or replaced.
Pump chatters, caviataion,
vibration
Air in system
Inspect places where air can enter the system. i.e. fittings, hose, connections etc.
Chemical line not submerged
If the chemical valve is on, ensure that the chemical line is fully submerged in the chemical
Inlet line restricted
All inlet connections should be snug and not kinked to reduce the chances of pump starvation.
Inadequate water supply
Water supply to the system must meet or exceed the rated flow (GPM) on the serial number
plate. Faucet must be completely opened or water above the tank outlet in a gravity fed system.
Float valve stuck (optional)
If float valve is stuck in the up position, water can not enter the float tank. Unstick valve if
possible of replace if necessary.
Turbulence in float tank (optional)
Excessive turbulence allows the pump to draw air into the system. Correct excessive turbulence.
Inlet or inlet strainer clogged
Regularly clean the inlet and inlet strainer to keep debris from entering the float tank
Water supply to hot
Inlet temperature should not exceed 140F - 160F range.
Inlet line vibrates
Air in system
Inspect places where air can enter the system, i.e.; fittings, hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the inlet check valve may be clogged.
Remove debris. Check o-rings under valves.
Outlet line vibrates
Air in system
Inspect places where air can enter the system, i.e.; fittings, hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the inlet check valve may be clogged.
Remove debris.
Pump packing bad
If they show signs of ware or damage, replace them.
Inlet and outlet lines vibrate
Inlet and outlet check valves
fouled
Look for the source of debris in the inlet and discharge check valves and remove.
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