How Sump Pump Failures Cause Basement Flooding

How a sump pump works

Groundwater collects in the sump pit. When the water rises, a float switch activates the pump, which discharges water away from the foundation.

Common failure points

• Power loss during storms
• Stuck float switch
• Clogged inlet screen
• Frozen or blocked discharge line
• Old or undersized pump

Reduce the risk

Test the pump each season, keep the pit clear of debris and consider a battery backup. Have a plumber inspect pumps that are noisy, cycle constantly or are near the end of their lifespan.