Yes, it is entirely normal for a sump pump to run every 15 minutes during periods of heavy rain, severe storms, or high seasonal water tables. As rainwater percolates through the soil and enters your perimeter drainage system, it flows into the sump pit at a steady rate, causing the basin to fill and trigger the pump at regular intervals. However, if this frequent cycling happens during dry summer months, it points to a failing check valve. Verification: Check weather conditions and inspect the check valve if rapid cycling occurs without rain.
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