The data is real data that he tested that is embedded into a system-flow estimator....that's how I have it (and how anybody can download the estimator themselves and graph any comparison of TESTED P&Q curves they want). It's an estimator because it takes real data from pumps and components and estimates flowrates as you combine them. The data itself is not an estimation--just what the Excel spreadsheet does when it combines the two different types of data is an estimation. FWIW, I did not combine the data in any way, I merely graphed the real data!
And of course you don't reach 4GPM. You probably wouldn't even reach 4GPM with three of your pumps and only a few feet of tubing and a radiator![]()




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