Pump is cycling off and on
Disc is worn out
This is usually due to differential pressure being higher than 125 PSI. Use a second valve to reduce differential pressure to original valve. Replace disc in original valve.
Pressure switch or valve not set correctly
Cut off pressure must be higher than valve pressure. Reset pressure switch or valve.
Waterlogged pressure tank
Bad or torn diaphragm
Replace pilot diaphragm
Valve is not set correctly
Demand is more than pump can provide at desired pressure
Reduce demand so it is within pump capabilities to maintain desired pressure.
Too much air pressure in tank
Reduce air pressure in tank to 12-15 PSI below cut in pressure.
Pump rapid cycles at start up and then begins to function correctly
Pressure switch is located on the main line or closer to the main line than the pressure tank.
Move pressure switch to small line at the base of the tank on a line no larger than 11/4" in diameter
CSV setting is too close to cut off pressure
Set pressure switch cut off pressure at least 10 PSI higher than CSV setting
Air pressure in tank too high
Reduce air pressure in tank to 12-15 PSI below cut in pressure
Multiple check valves in system working against each other
Remove all but the check valve or foot valve on the pump itself
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