Pondmaster HY-Drive 4000 Pump (No Cage) – A powerful 4,000 GPH hybrid-drive pond pump engineered for large ponds and high-flow water features. Combining direct-drive power with magnetic-drive efficiency, it delivers robust water circulation for waterfalls and filters while using less energy. This versatile pump is designed for use in skimmers or inline (sold without an outer filter cage), and it includes a pre-filter screen to prevent clogs. It provides continuous, reliable operation to keep pond water moving and filtered effectively.