The Jacuzzi R574/6 Heater Assembly is a powerful, high-flow heating solution designed specifically for Jacuzzi R574/6 spa systems. With its efficient 4 kW heating capacity and flo-thru design, it ensures rapid and even heat distribution to maintain comfortable water temperatures. The stainless steel housing provides exceptional durability and corrosion resistance, making it ideal for long-term spa use. Complete with essential components like a pressure switch, sensor, and 2” tailpieces, this heater assembly is a reliable, ready-to-install replacement for select Balboa and Hydro-Quip systems.