I just had a Pentair Intelliflo VS installed and am surprised by how loud it is. Unless I run it at low speeds (1750 RPM or so) it makes a "tone" that is very noticeable even from the other side of the patio. It doesn't really sound like something is "wrong," and the installer didn't indicate that it was a problem (nobody mentioned it while he was here), but given the reviews I've seen talking about how quiet these pumps are, I'm rather disappointed. The net result of the "tone" ends up making it sound worse than the pump I replaced, which was VERY old -- it was an all-metal body unit that the installer estimated was no newer than the 70's.
Should I only hear the white noise "water" sound when it's running at speeds in the mid 2000's, or is it also normal to here a motor "tone" at these speeds? Does it sound like something is wrong?