Automatic Pool Cover Pumps,Automatic pool cover pumps are electric and have an automatic on/off switch.amazonsurmountwayautomaticswimmingpoolcoverpump_2021 When water is detected on the surface of the pool cover, the pump turns on automatically to remove the water. When the cover is dry, the pump turns itself off.Automatic pool cover pumps can pump anywhere from 250 to 2,500 gallons of water per hour (GPH). The larger the pool, the higher capacity pump is required. Many automatic pool cover pumps can be fully submerged in water and will collect leaves and debris from the cover in addition to pumping water.