Rayf01 Posted July 20, 2018 Report Share Posted July 20, 2018 Hi all, looking for a bit of feedback here. I bought a home with a tub. After some looking, I elected to do a bit of overhauling and replace the pump/motor which was 8 years old and had some issues. Now, the pump for the old one had a sticker that said 3.5 hp on it. I took it to a pump/motor shop and the guy told me "I always go off the number on the actual impeller", which says 3. So he says it was a 3 hp pump. I had him order me a new one, and of course when I look at the amp ratings the new one is lower and its a 3 hp pump. I am pretty sure my old one is a 3.5 hp. Looking at the specs of both pumps, they both appear to run at the same RPM, 3450/1725 If I install the new 3 hp one, is it going to make a huge difference and lack in jet pressure or do you think a person would even notice it much? Keep in mind I have never used the hot tub before because as soon as I took possession of the house I drained it. I attached some photos. Old pump/motor are the one with the stickers together. New pump and motor are the one with the two single stickers. Quote Link to comment Share on other sites More sharing options...
castletonia Posted July 20, 2018 Report Share Posted July 20, 2018 The original might be a 4HP motor, based on the amp draw. Replacement definitely looks like a 3HP, again, based on amp draw. He is correct though, that the impeller matters. I have seen many company's use an impeller that is smaller that what the motor claims to be. No idea if you will really notice any difference. When I would order replacement pumps for customers I would order based off the amp draw and frame size of the motor. I always wanted it to match up with what was there originally. I didn't care what the supposed HP was. Quote Link to comment Share on other sites More sharing options...
Rayf01 Posted July 21, 2018 Author Report Share Posted July 21, 2018 Ok, well I guess I'll give it a go. Not sure what else to do, hopefully it works fine. It won't blow anything since the amp draw is less, just wondering about pressure. Quote Link to comment Share on other sites More sharing options...
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