Nitro / beer gas + canister questions

[tfrommer]

<I cross-posted this on the AHA forums so apologies if it's a duplicate for you.>

An online discussion kicked up over the weekend among some guys in my homebrew club. Myself and one other recently acquired or were gifted nitrogen canisters and / or a nitrogen regulator to serve our English ales and stouts. Our local welding supply company -- where we all get our CO2 canisters swapped -- has 75/25 beer gas but only in CO2 canisters. We may be about to set up a pop-up eBay shop to unload our brand-new items, but I digress.

• Is that typical (vs having beer gas mix in nitro cylinders?) or just a quirk of our local shop?
• A side conversation popped up about 100% nitro. One person who owns a homebrew supply shop says he stocks 100% nitro but only folks using it for cold brew coffee buy it from him. Why wouldn't you use 100% nitro for beer?

 

[day_trippr]

Stateside, nitro or beergas in CGA320 cylinders is unusual but not unheard of.
Typically CGA580 cylinders are used.

Beergas may be preferred vs straight nitrogen because the former can help maintain carbonation while the latter cannot. I run a dedicated stout faucet with 75/25 beergas and appreciate what the CO2 content provides...

Cheers!