Compare Quick view Watkins 73181 Watkins | Control System, Watkins/Caldera IQ2020 Advent (2002-2008), Less Heater, Circ Pump, Pump1, Pump2, Blower, Less Cords & Spaside MSRP: Was: Now: $761.96 Main Circuit - 2- Speed Pump 120/240V 2nd Circuit - 1 or 2- Speed Pump 120/240V 3rd Circuit - 1- Speed Blower 120/240V Spaside Control - Not Included System Voltage - 120/240V Component Configuration - Pump1 + Pump2 + Blower