Hi.. this is my first post here.. anyway, I've been trying to make a gas chamber to so I can process all the rats I have that are almost too big for my bp already. My problem is that I don't know where to get a release valve for my co2 tank so I can get the gas out of the tank and into the chamber.

I've been using this page: http://thereddragonsden.com/CO2.htm for my plans, and it says "First, go to your local paintball store (Welding supply may also have these items) and obtain a CO2 tank, CO2 release valve and a “Remote”" I already have the tank.. and the remote isn't a problem to order online.. but that darn release valve! I've looked on several paintball supply websites and haven't found anything, so I need some help figuring this out!

Thanks in advance for any help, and sorry for the long post.