Backup sump pump separate discharge alerts to failure of main pump

Backup sump pumps save you from flooding basement, but you need to be notified the primary pump has failed.

Your battery-driven backup pumps will have low charges and stop pumping, and the battery alarms also may be drained.
If the secondary discharge was onto the patio or driveway, you or your neighbors would see it.
It’s simple, and doesn’t require always checking and buying batteries.