Actually, I think that some people appreciate it very much. I suspect that some people are just not able to use those numbers, simply because there's no step-by-step instruction on how to use it, when they're face-to-face with the choices out there. In other words, the manufactures/distributors are at fault here.
I got a pump, and I did not consider what block/rad combo would go with it. If I had specs, I would have selected my pump more carefully. Right now, it stands with a max head of 14.4 feet, and will achieve more than 500 gph at zero head.
The good thing is that I can estimate my expected flow rate.
Back to BillA's Q: if I had to choose, I'd like to see psi as a pressure unit. It's not metric, as gmat would propose of course, since he's in France!
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