Quiet One 4000....not so Quiet!!!

[cayman isl]

I have this Quiet One 4000 on my closed loop and can't seem to get the thing to be quiet! It has a very annoying rattle to it. I checked all the fittings and checked the impeller, ceramic, and all other internals and everything appears to be fine. Even pushed, pulled, twisted, hammered, etc., etc., etc. - No Luck!
It sounds like it is cavitating but I can't find any source of air leaks or any debris stuck on the shaft or impeller.
Any ideas from you fellow Quiet One users?
It is external with a 1.5 foot head. The intake is 1 inch PVC and the discharge is 3/4 inch to 3 openings to the tank.
Thanks, this thing is driving me nuts!!!

 

[thesamm]

i have the exact same one...and the exact same problem came up first i added a foam pad thing...like one that would be in a cpr overflow....i stuck that under there and that made her a little quiet and so i took the thing apart and found nothing but once i was done and put it back together there was no rattle and every thing was fine

 

[cayman isl]

Thanks, I have a foam sponge under it as well... Maybe once they get broke in a bit they shut up.

 

[woodymdt]

Originally posted by Cayman Isl
Thanks, I have a foam sponge under it as well... Maybe once they get broke in a bit they shut up.
yeah, just like any good................nah......not gonna finish that one.............:hilarious

 

[cayman isl]

Dude, Thanks, I got a chuckle out of that one!!!
...and NO, THAT still hasn't shut up!!!
Now, back to my PUMP issue!!

 

[jfdjason]

I have 2 of those pumps and have 1 running externally and the other is internal. I don't seem to have any noise problems with either of them. Make sure all of your connections are tight and that its not rattleing on the tank itself from the return lines.

 

[cayman isl]

Thanks Jason, The rattling has stopped but I still have the humming sound. May be that the plumbing is agaisnt the canopy.
When you plumbed your external did you go hard pipe all the way or use flexible tubing?

 

[jfdjason]

Hard pipe all the way....

 

[cayman isl]

Originally posted by JFDJason
Hard pipe all the way....
Cool.... same here.... guess it has to be how the piping is set against the canopy. I'll have to reposition the plumbing a bit..
Thanks again,
Chris

 

[mpls man]

I have the same problem with my 4000, i have it running through a closed loop externally and i took the pump totally out of the loop and took it appart , and still had the ratteling sound, i have it hard plumed with pvc, still has ratteling sound, dont know what is causing it...... any ideas???