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Thanks for the reply. The problem is this is for our community pool but my home is closest to pump room and suffers most from its noise. I don't have direct access to the pool pump room. I talked to the maintenance people and they claimed everything is fine (as always!) and didn't see rpm...

Pentair Intelliflo variable speed pump turns louder (it is about 50% more sound, but quite noticeable since it is not like normal pump motor white noise, but more like "grinding" sound or with some tones (no high pitch tho), or like the sound when pump runs at much higher speed. Pump is set to...