The 4kW Double Barrel Heater with Sensors and Pressure Switch is a high-performance heating solution designed to provide efficient and reliable heating for hot tubs and spas. This versatile heater can be wired for 240 volts to deliver 4kW of power, making it adaptable to a variety of setups. Featuring built-in temperature and hi-limit sensors, it ensures precise temperature control and safety during operation. The integrated pressure switch enhances safety by monitoring water flow. This heater is designed to replace factory heaters in Hot Spring, Tiger River, and Limelight spas, offering a seamless replacement option for efficient spa operation.