It is also necessary to purchase a permit, which will vary depending on where you live. They are usually made of thermoplastic and have a motor above the basin. In order to install a sump pump, you will need to excavate a hole in your basement floor. Sump Pump in Crawlspace; When it comes to waterproofing your home, one of the most important tools to use is the sump pump. You may even need to lubricate the bearings from time to time. If the primary pump fails, a battery backup sump pump will help remove the remaining water. Most homes have one or more sumps. You can also find a good deal on a sump pump kit that can save you thousands of dollars in the long run. For the best results, replace it before it goes out.