[Noise D5 pump]

Hi guys!

 

i have a pacific DT40/D5 reservoir/pump combo.
 

Pump is noisy, it sounds like an old HDD working, it "scratch".

here is my config, done by Mathieu Heredia (vote for him! ):

 

 

Any tips to stop that noise? I have to set the pump on the minimum flow to stop the noise. I try th chase any air bubble just in case, nothing change.

Thx !

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Gogo Sassa <3