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If CO2 tank empties and check valve fails

1224 Views 6 Replies 5 Participants Last post by  eds
Hopefully your check valve won't fail on you, but I just wanted to post this as a heads up.
I let my CO2 cylinder empty all the way before disconnecting it for a refill.
Turns out my check valve had failed, allowing water to flow back through the system, into the CO2 cylinder. So when I took it in for a refill, they told me they have to pull the valve, and dry it out before they can refill it.
Not a huge deal, other than needing to make a 2d trip to the shop, and needing to maintain my tank for a week or so w/o CO2.
In the future I'll be careful to disconnect the cylinder before the pressure drops to zero.
Like I said, just posting my screw-up of the month as a heads up...
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Um... What about your regulator? Doesn't it have water in it now? I don't know whether it's even possible to dry out a regulator.
Whoa! I have my first pressurized CO2 system but haven't had to refill it yet, so your story was a good heads up for me. Thanks!
It was a brass one - don't know the brand.
Man, I hope the regulator isn't toast!
this is part of the basics of using a pressurized gas tank. You should never, ever let the tank empty itself down to zero. There should always be at least 200psi in the tank to keep any kind of moisture out of the tank. This is also true when you're not using the tank and are simply storing it. There should always be some gas in the tank at all times. Emptying the tank allows moisture to get in and could potentially cause damage to it. Especially steel tanks that could rust if not taken care of immediately. Regulator should be fine if it is properly cleaned.
Regulator should be fine if it is properly cleaned.
How do you "properly clean" a regulator?
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