Red plastic knob for aquastat De Dietrich 300019944

This red plastic knob is a replacement part for aquastats used in boiler and heating systems, allowing easy manual adjustment of temperature setpoints. The knob is designed to fit standard aquastat stems and provides a clear visual indicator of the setting position. As a simple yet essential component for boiler maintenance and repair, it restores full functionality to the temperature control interface, ensuring precise regulation of water temperature in heating equipment.