Therm 4.0 kW [15" x 2"] FloThru Heater [Dual Sensor Systems] (C2400-0807-TPS) airbuttons 1-1/2 inch slip air and

1-1/2 inch slip air and water connections

Retrofit design

and this Jacuzzi Magnum 0

When the visible upper section of a valve begins to fail

5 inch slip to 1

Therm 4.0 kW [15" x 2"] FloThru Heater [Dual Sensor Systems] (C2400-0807-TPS) airbuttons 1-1/2 inch slip air andThe Therm 4. 0 kW flo thru heater is designed for compatible 2 inch by 15 inch 240 volt applications that use a dual sensor system. Heaters with application specific sensor support are useful because they help preserve the control logic and monitoring setup that the spa was originally built around. This replacement is especially useful when the original heater has failed, is heating inconsistently, or needs replacement while maintaining compatibility