This natural gas combination valve is designed to use with Zodiac Jandy Series 1 EPG and EPM heater models 125, 175, 250, 325, 400 and also compatible with Zodiac Jandy XE EG pool heater models 125, 175, 250, 325, 400. Product also fits Zodiac Jandy Mark V DM Series and DR Series pool heater models 125, 175, 250, 325, 400.