If so, you'll need to make sure you don't build the pit for the pump too close to the street. You might be surprised at what you find. First, do you have the proper dehumidification system? Second, do you have a water alarm? A water alarm will warn you if there is water in your basement. There are other things to consider in choosing the right perimeter drain and sump pump for your home. In addition, a pump helps prevent mold growth, which can damage walls and warp wood. Sump pumps are available in two types: pedestal and submersible.