1.5kW & 3.0kW Arcadia Spa Heater Element Tube Assemblies – These are obsolete and have been completely abandoned by the manufacturer. You will need to be replaced with a retrofit control system, as listed below.
They came from these Arcadia Spa Control Systems
SP-01, SP-02, 124753 – 3.0kW, 124923 – 1.5kW