Stopping a sump pump from short cycling (turning on and off every few seconds or minutes rapidly) requires addressing the root cause of the rapid water return. If the issue is caused by a faulty or missing check valve allowing discharged water to drain right back into the pit, install a replacement check valve on the discharge pipe pointing upward away from the pump. If the pit basin is too small for the volume of water, you may need to upgrade to a larger basin. Verification: Watch a complete pumping cycle to ensure the pump runs steadily for 10 to 30 seconds and remains off until the pit fills naturally.
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