Compatible with ALL Hayward ED2 Heaters: H150ED2C, H150PED2C, H200ED2C, H200PED2C, H250ED2C, H250PED2C, H300ED2C, H300PED2C, H350ED2C, H350PED2C, H400ED2C, and H400PED2C. Compatible with ALL Hayward Millivolt (Standing Pilot) Heaters: H1501C, H150P1C, H2001C, H200P1C, H2501C, H250P1C, H3001C, H300P1C, H3501C, H350P1C, H4001C, and H400P1C.
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