I've seen a lot of people detail using the orange carboy caps with co2 hooked up on one piece and then a siphon coming out the other which goes to liquid post of a keg, and then just pull the relief valve on the keg for filling.
I've hooked it all up but I can't quite the beer to start flowing because so much pressure's coming out from under carboy cap. I've tried zip ties, wrapping tape/string tightly around it, etc. with no luck.

Does anyone do this using those caps and if so do you use a specific cap, use a band clamp of some sort, or what?
I've hooked it all up but I can't quite the beer to start flowing because so much pressure's coming out from under carboy cap. I've tried zip ties, wrapping tape/string tightly around it, etc. with no luck.
Does anyone do this using those caps and if so do you use a specific cap, use a band clamp of some sort, or what?