The 5.5KW Heater Assembly is a 240V low-flow spa heater engineered specifically for Sundance® and Jacuzzi® hot tubs. Designed as a direct replacement for the 6500-402 and 6500-403 models, this heater features a titanium heating element for exceptional corrosion resistance and long-term performance, especially in saltwater systems. Its low-flow compatibility makes it ideal for circulation pump systems, providing consistent and efficient water heating. With built-in safety features like a thermal cutout and an auto-reset hi-limit sensor, this heater delivers both performance and peace of mind.