CO2 Distributor Questions

[Qs]

I got one of these 4 way CO2 distributors and I'm wondering is there a way to get JG fittings on them or should I just use clamps?

Also should I be able to blow air through it when its open?

[Qs]

I should probably show which type it is, one of these lads.

[Oh Crap]

Do the barbs screw off?
If so get some FFL JG fittings..

[dcalnan]

Better to use clamps, they sell the distributors with the 1/4mfl connections as well but with the barb's I use clamps.