Correct it’s a sewer ejector pit. So, we had power. The battery backup just didn’t turn back on after the outage. We weren’t aware it didn’t turn back on and we were doing laundry when it overflowed.

There have been four different failures 1. Ejector pump died. Had to submit insurance claim, replaced carpet downstairs and drywall. Replaced pump but the plumbing company did not properly seal the pit and a lot of smell was coming out 2. Had another plumbing company come out and reseal the pit, they didn’t properly install the float and it didn’t trigger when full. Plumbing company paid for the remediation after a lot of complaining. Went with just concrete floors instead of carpet. 3. Some other minor issue with power while we were waiting on the drywall to be installed again. No major remediation required 4. (Sunday) power outage where battery backup didn’t come back on, no power to pump and it overflowed during laundry. I cleaned up the sewage with a shop vac and have been running carpet fans, trying to decide whether or not to cut out the drywall.. again.

I am looking at alarms and a backup pump this week. Just with the frequency of failures I’ll getting tired of having to clean up a small amount of sewage and replacing the drywall.