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An uprated pump is a bit of a trick by the pump manufacturers. Basically, for the most part, they are playing with something called the "service factor" of the pump, that value should be found on the rating sticker on the pump under "service factor" or sometimes simply "S.F."

The reason they can do this is an electric motor doesn't actually have a set in stone rating for Horse Power. Because of this they can put say a 1HP impeller, the part that actually moves the water, in a pump that has a 3/4HP "normally" rated motor and it will do the work of the 1HP. Thus they call it a 1HP but the service factor is different.

The impellers don't cost any more so they are making a cheaper pump, but the cost to you will be in the future that 3/4HP motor will burn out quicker. It's being made to work harder.

If you are shopping around for a pump, looking at the same make and model at different stores, be sure to note the service factor of each and take that in to account when looking at the difference in price.

Hope this is understandable and helps.

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16y ago

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