Mag 12 Impellar Rattling


New member
So I fired up my Mag12 that I was going to use as my sump return, but the impellar is rattling really loud. Does anyone know how to solve this problem? The inside of the impellar housing is clean.

If I can't fix it and decide to replace it, what kind of pump would everyone recommend? I am running it externally.


New member
this happens with mine too.
It's time for a new impeller.
swapped mine, problem solved


Premium Member
Mine was rattling and it looks like the impeller shaft was broken off. Make sure that there is one piece in the housing. I know it sounds confusing but I think you will be able to figure it out. Good luck, Tim


In Memoriam
I'm guessing the magnet on the impellar assembly is chipped or damaged. A new impellar should fix it. Make sure if you get a new impellar, you get the right one. I believer there is an 'A' and 'B' model pump. Should say on the label.


On Yer left!
Premium Member
Where did you get it? If you line in Indy, I would assume you use Premium Aquatics? If so, I would have them replace it.