Hayward H-Series Above Ground Thermostat (IDXTST1930) permacast Polaris Zodiac Lock Ring

Polaris Zodiac Lock Ring

Long jet internals are designed to shape the final feel of the seat

The TLD10B is a practical service kit when a compatible 10-hole light niche needs dependable bottom-side repair support

The dual flow-path design matters because it helps preserve the more complex seat feel the original system was built to provide

Hayward H-Series Above Ground Thermostat (IDXTST1930) permacast Polaris Zodiac Lock RingA heater thermostat helps regulate temperature control, and a failing one can lead to inconsistent heating or unreliable operation. This Hayward H Series above ground thermostat is a replacement control component for compatible heater models, intended to support proper temperature sensing and heater response. Use it during heater service when diagnosis points to the thermostat or when the existing part is damaged or no longer performing correctly.