While the Stream 3 is digital control, it takes a standard 0-10V input but it is 0-6.5V range for speed control and converts that to digital on the 7090.600. It really should work the same as any other model of Stream pump made since 2015 with the 7090 controller on an Apex. The 7090 needs to be in external mode and a 6150 can run as slow as 5%, anytime you turn it off, it will have a couple second delay to restart as it first has to run through a start sequence to levitate the drive unit from off.