Is there a difference between the gas "in" quick disconnect on a corny keg and the beer "out" disconnect? I have a very slow leak and I think it is because I am using a beer "out" disconnect on my gas "in" side. I know I can use soapy water to find the leak, but if there is a difference in disconnects I would rather change out the disconnect first, then check for a leak. The disconnects are different colors for the "in" and "out", just wondering if there is a physical difference between the two. Thanks for any help!