PROLINE HIGH-FLOW SUBMERSIBLE WATER PUMPS are our latest line of Water Pumps by Danner Manufacturing. They each feature a vortex impeller for increased torque flow which eliminates clogging and binding made of F.R.P (fiberglass reinforced plastic) for minimal abrasive wear. The HFS pumps also feature a rugged, durable stainless steel motor which is corrosion resistant for all kinds of weather elements. The HFS Pumps have built-in thermal protection which is a self-resetting automatic protection against overload and overheat conditions. They also feature high-quality double silicone carbide mechanical seals (impeller side) for increased performance and additional abrasive resistance.Vortex Impeller for Increased Torque Flow: The torque flow impeller eliminates clogging and binding. Made of F.R.P. (fiberglass reinforced plastic) for minimal abrasive wear. Rugged Motor: Durable, Stainless steel. Corrosion resistant motor. Built-in Thermal Protection: Self-Resetting automatic protection against overload or overheat conditions. High Quality Mechanical Seals: Double Silicone Carbide mechanical seals (Impeller side) for increased performance and additional abrasive resistance. Large Solid Handling Capability: Non-clog vortex impeller and volute designed for water containing decomposed plant matter and debris.