A sump pump in your crawl space works the same as any other sump pump. By installing a sump pump in your crawl space, you will be able to remove water from that specific area and direct it outside away from your home. Since a crawl space is a much smaller area to work in, there are smaller visions of sump pumps available specially made for these tight spots. Smaller sump pumps for your crawl space still work the same as any regular size one. Reach out to your local crawl space contractor for more information on available products and solutions.