Hayward C-Spa XI Thermostat Knob Black (CZXTSK2003) calvertengineering Includes venturi air bleeder and

Includes venturi air bleeder and O-ring

or equipment repair applications where the original part number and physical configuration need to be matched closely

Helps form the wet-end housing and discharge pathway

or installers who use sealant regularly and want a consistent supply in a color that can better match certain finishes or applications

supporting more reliable operation and stronger assembly integrity

Hayward C-Spa XI Thermostat Knob Black (CZXTSK2003) calvertengineering Includes venturi air bleeder andThis black thermostat knob is a replacement control part for compatible Hayward C Spa XI heater applications. A damaged or missing knob can make temperature adjustment difficult and reduce usability at the equipment pad. Replacing it gives the control panel a cleaner, more functional feel during routine operation. Replacement thermostat knob for compatible C Spa XI heaters Helps restore manual temperature adjustment Black finish for matching control