Cycle Stop Valves
Constant Pressure Pump Control Valves
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CSV1A Troubleshooting

SymptomCauseRemedy
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 Replace tank
Bad or torn diaphragm Replace pilot diaphragm.
Low Pressure Valve is not set correctly Reset valve
Demand is more than pump can provide at desired pressure Reduce demand so it is within pump capabilities to maintain desired pressure.
Chattering 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
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Cycle Stop Valves, Inc.
10221 CR 6900
Lubbock, Texas 79407
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800-652-0207
Fax: 806-885-1994