Hayward H-Series Thermostat Kit w/Knob (HAXTST1930) cfrfilters Useful when multiple matching replacements

Useful when multiple matching replacements are needed

Supports proper VS-series platform matching

Waterco HydroStar trap lid

Supports cleaner installation and reliable heat restoration

Hayward H-Series Thermostat Kit w/Knob (HAXTST1930) cfrfilters Useful when multiple matching replacementsTemperature control is central to heater comfort and reliable pool or spa operation. This Hayward H Series thermostat kit with knob replaces worn or failing thermostat components on compatible heater models, helping users adjust and maintain the desired water temperature more confidently. Aging thermostats can lead to inconsistent heating, poor response, or difficulty setting the heater where it needs to be. Installing a proper replacement helps