To start, homeowners must first determine the location of a sump pump. As well, your final price will depend on how complex the installation is. External Sump Pump Installation Montclair: A sump pump can help protect your basement. Our professional team can also help you with a sewage pump, battery sump pump installation, and more. Battery backup sump pumps are available in both water and battery-powered varieties. Usually, your sewage pump has a discharge line that's attached to the sewer or outside of your property.