Sundance Spas 6500-310 Heater Assembly 5.5KW 60HZ Smart Heater John Merkel 8 years ago Fits these machines: Allied SD6500-310 5.5kW 60Hz Smart Low Flow Heater AssemblyDateDecember 3, 2018In relation toSimilar postThermcore C2550-0011 Cal Spa XL Heater 5.5kW 230V repl for F2550-0011 F2550-0001DateNovember 10, 2016In relation toSimilar postConsumer Engineering 411092 Heater Assembly44; 2 in.DateNovember 29, 2018In relation toSimilar post