This on/off switch is designed to use with Hayward H-Series and H-Series Millivolt heater models H1501, H150P1, H2001, H200P1, H2501, H250P1, H100ID1, H100IDP1 and also compatible with H-Series CZ and HM2 models.

• Replacement on/off switch
• Fits hayward h-series millivolt heater models H1501, H150P1, H2001, H200P1, H2501, H250P1
• Also fits hayward h-series pool heater models H100ID1, H100IDP1
• Also fits H-Series CZ and HM2 models