Graph was from this thread:
http://forums.procooling.com/vbb/sho...&threadid=7931
Much more discussion there.
Mfgrs P-Q curves here:
http://www.procooling.com/~phaestus/pqcurves.jpg
Bill's testing here:
http://www.swiftnets.com/Technical/R...mp-testing.asp
All point to the MCP600 being more powerful than 1048 or 1250.
I am an especially big fan of this way of graphing the test results:
So you can clearly see the relationship between the loop's resistance, the pump P-Q curve, and the data points.