I had a L30 that had an annoying rattle. superglue trick didn't work on it as it does on my current aqua via 1300. I think it might be a case of getting a bad one. On inspection, my impellor had a slight wobble when I spun it on its shaft. I had sent my back for a replacement. If its not the impellor rattling and its just the general pump humming, toss the suctions cups and set the pump on a thick spong/foam pad and will eliminate the resonating thru the case.
Also, the L30's make quite a racket until you bleed all the air out.
|