Val-Pak Martin 600 15.0 HP Medium Head Impeller [w/SS Key] (V20-307) is a replacement pump impeller from Val-Pak Products for compatible pool or spa pump assemblies. The impeller is responsible for moving water through the pump housing, so correct horsepower rating, pump series, shaft fit, and wear-ring compatibility are important for performance. Use part number V20-307 when matching this item to an existing component, owner’s manual, parts diagram, or service record. Key identifiers and configuration details include w/SS Key. Replacing a damaged, worn, or incorrectly sized impeller can help restore flow and reduce vibration or cavitation issues.Match the impeller to the exact pump model and motor horsepower before installation. Inspect the diffuser, seals, wear ring, and volute while the pump is apart, since related worn parts can shorten the life of the repair. Genuine or listed Val-Pak Products replacement option for Pump Impellers applications Designed for matching by part number, equipment model, and physical configuration Useful for repair, rebuild, routine maintenance, or replacement service Compare size, voltage, color, connection type, and model details before ordering Professional installation is recommended whenever electrical, gas, pressure, or code-sensitive work is involved