The Helix HLSP5500 Submersible Pump is a high flow, energy-efficient hybrid drive pump that is engineered for 24-hour continuous use in low-head applications. The oil-free pump promotes clean water and is safe for fish and aquatic life. Overload sensor prevents pump overheating and burnout. The high-quality seals protect pump parts for long life and the pump can handle solids up to 1.25" in size.