Sump pumps are responsible for pumping excess groundwater from the basement or crawl space to the outside of your home. Installing a sump pump in your basement is your best defense to prevent flooding. Basement flooding is an all-too-common experience for many Minneapolis-St. Paul area homeowners. Studies show that 90 to 95% of all basements will, at some point, experience a problem with water penetration that something as simple as a sump pump could have prevented. Even one inch of water can take many hours to clean up and cause thousands of dollars in damaged furniture and flooring.