|Pump is cycling off and on
||Diaphragm 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 diaphragm 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 5-10 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 1 1/4" 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 5-10 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