HomeAdvisor’s Sump Pump Cost Guide lists price information on installing and replacing a sump pump in a ba.t, as reported by HomeAdvisor customers..Ba.t Watchdog GPH Battery Backup Sump Pump System GPH at ft. lift. GPH at ft. lift. . amp charger. Dual float switch. User friendly controller..Learn all about sump pump installation costs. Read general sump pump prices, tips and get free sump pump estimates. CostOwl.com.Find out how to install a sump pump by following this how to guide!.