A hugely popular heater for Hotsprings, this unit is a revision of the types shown below - its name reflects the fact that poor water chemistry maintenance can no longer be a cause to void the heater warranty - it is next generation...
With Flow Switch
Replaces old numbers C3073-1, C3073-KIT, C307301KITTNB, 72796, 76229 - typically identified by a grey cable with a white plug that comes out of the heater black box and onto the circuit board.
It is now supplied with a flow switch kit which includes a straight flow switch (fitted with a 1 meter long cable and a 3-pin connector) and two pipe clamps which requires it to be installed into the plumbing line coming out of the heater. This assembly has an auto-reset Hi-Limit.