Valve id.

[brucieboy]

https://www.flickr.com/photos/423213.../shares/XNm5F4
Anyone know what these are for? Got them with an Aeron Co2 pistol years ago,never found out what they're for.The small one screws into the place where the normal cap piercer goes,the big on will fit onto the small one but only goes hand tight then spins.I presume it's some kind of bulk fill but no idea what the threads will fit.

[MartynB]

https://www.flickr.com/photos/423213.../shares/XNm5F4
Anyone know what these are for? Got them with an Aeron Co2 pistol years ago,never found out what they're for.The small one screws into the place where the normal cap piercer goes,the big on will fit onto the small one but only goes hand tight then spins.I presume it's some kind of bulk fill but no idea what the threads will fit.

A bleed valve maybe ?

[thisisdonald]

I think.its for a soda stream bottle... there's a pic of the bulk fill arrangement at my club on the wall.. I'll take pics tomorrow