Horsepower Rating

If you have wondered “what is the difference between Full-Rated and Up-Rated horsepower for pump motors,” you are not alone. While I figured out it seemed to be a marketing distinction (a.k.a. ploy) by looking at the flow curves for my Pentair WhisperFlo pumps, the on-line retailer POOLplaza has a short article explaining how this slight of hand is executed. The bottom line is “use the pump/motor curves” for making your choices.

My earlier post “Pump and Motor Efficient Sizing” is related, and may be of interest at this time.