(Davey) Spa Power SP600/601 PCB The (Davey) Spa Power SP600/601 PCB. Pump1: Single or dual speed pump + circulation pump if required. Pump2: Single Speed (Only If Pump 1 Is Single Speed With Circ) Air Blower: Single Or Variable Speed Heater: x 1 (1.5KW) Ozone: x 1 Light: x1, 12 volt.