Yes, it can be entirely normal for a sump pump to run every 20 minutes during heavy rainstorms, high groundwater tables, or spring snowmelt. As rainwater saturates the soil around your foundation, it seeps continuously into the sump pit, causing the basin to fill and trigger the pump at regular intervals. However, if your pump cycles every 20 minutes during bone-dry summer weather, it indicates a faulty check valve allowing discharged water to drain back into the pit. Verification: Check weather conditions and inspect the check valve flow direction if cycling occurs during dry periods.
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