Vacuum Question

[dfab]

Hi All,

I have a CT22 and recently noticed that when i use the 1" hose i hear a high pitched screeching sound.  As a test, i tried the 2" hose and it was fine. 

Any ideas on what could be causing this?  Suction doesn't appear to be affected, it's just a  bit annoying to listen to.

Thanks in advance for any feedback.

 

[greg mann]

Sounds like something might be stuck in the hose and acting like a reed on a clarinet.  ;D

 

[dfab]

Thanks Greg.  I just pushed a long piece of molding through the entire length of the hose and it seems clear.

In addition, i just removed the nozzle (part that inserts into the tools) and the noise is gone.  Put the nozzle back on and the noise returns.

 

[T. Michael]

Hi, I have the same issue with my CT33.  It's just the speed of the air through a small opening; a minerature pipe organ?  Can be solved by slowing down the motor speed control on the unit to where the whistle is just below audible.

Mike

 

[mastercabman]

Hi, I have the same issue with my CT33.  It's just the speed of the air through a small opening; a minerature pipe organ?  Can be solved by slowing down the motor speed control on the unit to where the whistle is just below audible.

Mike

same here!i have the ct22 and i hear the same sound.it's because of the small opening of the hose.

 

[dfab]

Thanks! Appreciate the feedback.

 

[Michael Kellough]

One of my Bosch sanders came with a long small diameter hose. It has such a small opening and is so flexible that it's length changes as the vacuum is applied and reduced so the hose makes a whistling sound that clearly changes pitch as the hose length changes.

 

[mot]

My SV does the same thing when I have a certain bend in the hose.  The air gets slowed down because of the bend and it starts to make a whistle...more of a shriek, actually.