While doing my last water change 2 days ago, my recirculation pump (MAG 7) didn't want to re-start.
So, I took it out of the sump, which is easy to do when you have a union in the return line, and took it apart.

Upon inspection I could see that the the impeller housing has excessive wear on one side where it holds the shaft in place .

There was also some wear in the impeller assembly, so I replaced it, hoping it would help and reduce the noise that this pump makes.

I put it all back together, hooked it back up  but the noise is the same. So, I will be looking for a new pump...

 

I will post some more pics, when I replace it.

Waffleman