Whistling Air Manifold

[Monox]

I recently picked up a 4-way air manifold from eBay (http://cgi.ebay.com/4-way-Co2-Gas-d...465?pt=LH_DefaultDomain_0&hash=item45f0776349) and after hooking it up, I've noticed a very loud whistling sound when air flows through it. Any ideas what would cause this, or how I can stop it?

Here is a sample of the sound, the initial whoosh is me purging the keg.
http://dl.dropbox.com/u/1963259/9_14_2010 10_02 PM.mp3

Thanks,
Monox

 

[malkore]

If you hear anything, its because you have a pretty big leak. You can have silent leaks, but if you hear it...its a big leak.

I can't see the link here at work, but I'd get some soapy water or leak finder fluid and figure it out before you run out of CO2.

probably need to wrap threads in teflon tape, and tighten fittings...

 

[Monox]

The sound only occurs when air is flowing (eg, if I purge the keg, or pour a glass), otherwise, it's perfectly silent.

 

[denimglen]

It's the check valves.

I have the same manifold and it does it also.

 

[Monox]

Thanks, I was hoping it was something to do with the tubing (I have the cheap, clear 5/16" ID hose) since that is much easier to replace.

 

[malkore]

Ahhh, yep if it only whistles when you're knowingly releasing gas, I retract my statement on a leak. Makes perfect sense that the check valves would have a little 'wurrrrr' to em.