Scan this site as this has been discussed before. Personally, I use the barb on the hoses WITH a hose clamp as a back up. Let the hose get warm and put it on the barb and then clamp it down. If this setup is going to be in the kegerator, the hose will naturally shrink because of the temperature. Will give you a good, long lasting seal. Test them out first as I didn't and the next day, I lost 20 pounds of gas. After getting that taken care of, I've had the same 20 pound tank on the kegs for about 5 months now and all is good.