This son-of-a-gun has been a big leaker for me!
http://www.midwestsupplies.com/4-way-co2-distributor-5-16.html
So much so that I gave on it and haven't been using it for the past year. That is until last night when I became determined to seal the leaks. While trying to remove the shutoff valve to add new teflon tape, I ended up stripping the threads in the aluminum tube. I'm going to see if Midwest will allow me to exchange it.
