A sump pump is designed to remove groundwater that collects in the pit, not to drain a basement that is already flooded. If water is coming in faster than the pump can move it, or from sources the pit does not collect, the pump alone cannot keep the basement dry.
What a Sump Pump Is Built For
The pump handles water that seeps under and around the foundation and flows into the pit. During heavy rain or snowmelt, that flow can be strong, but a properly sized pump usually keeps up. It is not meant to handle water pouring in through windows, doors, or from a burst pipe.
Why a Pump May Fall Behind
- The pump is too small for the amount of water entering the pit
- The power goes out during the storm
- The discharge pipe is frozen, blocked, or too narrow
- Water enters the basement from above ground, not through the pit
- Water from a sewer backup comes up through floor drains
During a Flood
Stay out of standing water if it may touch outlets, cords, or appliances. Do not try to reach the pump or its plug while standing in water. If the water is from a sewer backup, stop using all drains. Move belongings upstairs if you can do so safely.
Ways to Improve Protection
Making sure the pump is sized correctly, adding a battery backup, keeping the discharge line clear, and directing downspouts away from the house all help. A high-water alarm warns you if the pit fills faster than the pump can empty it. Some homes may benefit from a second pump.
After a flood, have the pump checked even if it seemed to work.
If your pump struggled during a storm, having it tested and possibly upgraded is a smart step. For questions about where basement water is coming from, you can ask our team to find the source by calling (833) 603-1840.