Spa Components 5.5kW [19" x 2"] FloThru Heater [NuWave] (B24055C) praherplastics Multiport valves like this play Multiport valves like this play a central role in how water is directed through the supported filtration cycle A part like this is especially useful when the owner wants to refresh the visible face of the jet while also restoring the internal flow behavior that contributes to the overall seat experience Useful when the original heater is failed or inconsistent Heaters like this are useful because the right physical size can be just as important as the wattage when replacing an in line heating assembly