Battery-powered backup sump pump with float switch (1/2-hp for moderately wet areas, 3/4-hp for spots with heavy flooding); Plastic sump tank (18-in.-dia. by 24-in. deep is standard); ...

Check the float switch Like a toilet, sump pumps are designed with a “float” that triggers the pump cycle. This is exactly what it sounds like: A plastic ball that floats on top of the water.

Combo Backup Sump Pumps Combo sump pump systems replace your existing sump pump with a setup that includes both a plug-in 120-volt primary pump and a battery-powered backup pump.

10. Plug the sump pump back into the electrical outlet: Post cleaning, plug the sump pump back in and test its functionality by pouring some water into the pit. Observe if it successfully turns on and ...