Aftermarket Hi-Limit Rear Header for Hayward® H-Series® (160°F)

This generic replacement for the Immersion High Limit Switch is a high-quality alternative to that important switch in your Hayward® H Series® pool heater, and is used to detect when your water temperature has exceeded a safe level (160°F) and immediately opens the heat exchanger outlet when that happens. Refer to your Hayward® H Series® manual for signs that the Immersion Rear Header Hi-Limit switch has reached the end of its lifespan. This Optimum Pool Technologies replacement sensor is triggered at 135°F. Features: Compatibility: Hayward® Universal H-series® low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp, h300fdn, h300fdp, h350fdn, h350fdp, h400fdn,h400fdp. Also fits H-series® millivolt and electronic pool heater models h1501, h150p1, h2001, h200p1, h2501, h250p1 For Use With: Universal H-Series® Low NOx Pool Heaters and H-Series® Millivolt and Electronic Pool Heaters Specifications: Replaces: HMXHLI2932 Manufacturer: Optimum Pool Technologies, In