The Grid Controls Diverter Valve Extension Knob [2 or 3 Port] gives compatible Grid Controls 2-port or 3-port diverter valves a serviceable external control point for turning or extending the valve position. It is intended for situations where the original knob is missing, damaged, weathered, or difficult to grip. Because diverter valves are often installed in tight equipment areas, a properly matched knob helps make routine water-flow adjustments easier without replacing the full plumbing assembly. Confirm the valve style, port count, shaft connection, and part number 03011 before ordering. Replacement extension knob for compatible 2-port or 3-port Grid Controls valves Helps restore hand operation of the diverter valve position Useful when the original knob is cracked, faded, stripped, or missing Designed for water-flow control adjustments on pool or spa plumbing Verify valve shaft style and port configuration before installation