This will ensure that the sump pump will not run into the street. The discharge line should be buried at a depth that is at least a foot below the top of the check valve. Some are quieter than others. To start, homeowners must first determine the location of a sump pump. Having a sump pump installed can cost hundreds or even thousands of dollars, depending on your location. Once you have found a suitable location for the sump pit, you should excavate the area and make a hole. It is recommended to have yours professionally installed by a licensed plumbing contractor.