I thought I had a noise rating chart in db's for most pumps, of course because I'm looking for it I can't find it (should have posted it to the board right away) but thought that series was in the 30db range or so, a bit on the loud side, but it shouldn't be THAT loud, most of the noise should be from the water and impeller.

Can you be a bit more descriptive about the noise? Mechanical metal on metal, vibrating...etc