Last night I installed the 22 GPM pump on the splitter. The only real issues was not remembering that the intake is larger than my 1" hose, and the outlet is 1" as well, and my fittings were 3/4"... End result?
It works pretty darn well! Now that 5" cylinder moves with some speed, and still appears to have plenty of grunt. The only down side is that the drive motor is not rated for the flow that this monster can put out. Drop the engine speed to 1/2 and it moves around okay.