| Pump is cycling off and on |
Pilot screen is stopped up |
Clean screen |
| Liner is not seated correctly or debris or sand caught between liner and seat |
Remove liner and check for debris, reinstall liner |
| Pressure switch or valve not set correctly |
Cut off pressure must be higher than valve pressure. Reset pressure switch or valve. |
| Liner not seated correctly or worn out or debris caught between liner and seat |
Remove liner, remove any debris. Suction test by placing liner on flat surface and pressing on the center. Liner should hold suction. Reseat liner or replace if worn. |
| Waterlogged pressure tank |
Replace tank |
| Bad or torn diaphragm in pilot valve |
Replace damaged diaphragm |
| Low Pressure |
Valve is not set correctly |
Reset valve |
| Check red shoulder fitting on pilot for enlarged or missing orifice |
Replace worn orifice |
| Demand is more than pump can provide at desired pressure |
Reduce demand so it is within pump capabilities to maintain desired pressure. |
| Chattering valve |
Pressure tank is located too far away from the valve |
Relocate valve or tank to bring them closer together or add a second smaller tank to the system close to the valve. |
| 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. |
