[tfrommer]

<I cross-posted this on the Home Brew Talk forums so apologies if it's a dupe 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?

[Stevie]

You don’t use 100% nitro because it doesn’t dissolve easily in beer, still need some co2. The coffee people don’t want co2.

I wouldn’t say it is typical for a standard co2 cylinder to be used, but I’ve heard it in other places as well.

[Robert]

Because nitro doesn't dissolve well, mixed gas (nitro and CO2) is also used in long-run draught systems in order to get the required dispense pressure without extra CO2 pressure, which over time would dissolve and overcarbonate the beer.

[69franx]

Often times on the above mentioned long run draught systems, 2 cylinders are used: 1 Co₂ and one Nitro. The system uses a down stream mixer to mix the 2 at desired proportions. This is what we always used in the restaurants and bars I worked at in the past

[Stevie]

Often times on the above mentioned long run draught systems, 2 cylinders are used: 1 Co₂ and one Nitro. The system uses a down stream mixer to mix the 2 at desired proportions. This is what we always used in the restaurants and bars I worked at in the past

Or a nitrogen generator is installed to eliminate the need for nitrogen bottles.

[Adam]

See if your gas supplier carries, or can get you, a converter for your nitro regulators.  there is a product that allows you to use a c02 regulator with a converter that can attach to a nitro /beer gas tank.  They may have the same thing for nitro to C02