Yes, it can be entirely normal for a sump pump to cycle on every 30 seconds during torrential downpours, heavy rainfall, or rapid spring snowmelt. When massive volumes of groundwater saturate the soil around your foundation, water pours rapidly into the sump pit basin, filling it up almost immediately after each pumping cycle finishes. As long as the pump successfully expels the water and shuts off between cycles, it is functioning correctly. Verification: Monitor weather conditions and ensure the pump catches up once the heavy rain subsides.
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