Botanic Garden >> Gardening > >> Question and Answer >> Irrigation

Centrifugal Pump Rapid Cycling: Pressure Switch Adjustment or Nozzle Upsizing

New Pump Short‑Cycles On/Off; Broken Head Zone Ran Fine

Rapid cycling indicates the pressure switch cuts out too quickly. The zone with a broken head flowed enough water to keep pressure below the cut‑out threshold.

Options:

Adjust the pressure switch differential (wider spread).
Install larger nozzles on the rotors to increase flow and reduce cycling.

Consult a pump specialist for precise switch settings.

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