Why don't smaller (1/2 to 2 hp or so) pumps have efficiency curves? How accurate is the 60% pump to wire efficiency quoted for smaller pumps? Any other good information on efficiency of these pumps?

I have a program(Pipe Flow Expert--from my dad's work)I'm using to model my home plumbing/piping system and I'm trying to get it as accurate as possible.

Thanks,

Steve

Steve C Boyack