A sump pump is a submersible pump that sits at the bottom of a sump pit, which is typically installed at the lowest point in your basement or crawl space. Ground water surrounding your home's foundation is channeled into a perimeter drain system installed at the base of the foundation. A failing sump pump will result in your home flooding. Doherty Plumbing can fix your sump pump if it is not working properly or replace it if it needs to be.