OPTION 1, WILO 3 WIRES ONLY FOR PRO MODELS
OPTION 2, GRUNDFOS 3 WIRES ONLY FOR PRO MODELS
OPTION 3, GRUNDFOS 5 WIRES ONLY FOR PLUS MODELS
OPTION 4, DUCA WILO REPLACEMENT 5 WIRES ONLY FOR PLUS MODELS
option 5,OLD PUMP IS 5 WIRE GRUNDFOS WITH BLACK BOLTS