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To help Dylan out -
Guinness on draft is a bit different than most other beers, in that nitrogen should be used instead of carbon dioxide (CO2). The dispensing tap in the bar looks different - it has a tapered black "snout" instead of the normal metal tap.
Take a look at the picture below - most of the taps are for CO2, but the two on the right hand end are for nitrogen.
This adds cost to the bar - maintaining two gas systems, having taps dedicated to only certain beers, etc.
Nitrogen bubbles are smaller than CO2, so the mouthfeel of the pour is a bit "creamier." Also, the tiny bubbles lead to the "cascade" effect, of a glass full of froth morphing into dark, creamy brew. The glass then needs to be topped off, leading to the "double pour."
For independent study, grab an appropriate beverage and read this article - Good Beer Gas: Nitro Beers Explained
Guinness on draft is a bit different than most other beers, in that nitrogen should be used instead of carbon dioxide (CO2). The dispensing tap in the bar looks different - it has a tapered black "snout" instead of the normal metal tap.
Take a look at the picture below - most of the taps are for CO2, but the two on the right hand end are for nitrogen.
This adds cost to the bar - maintaining two gas systems, having taps dedicated to only certain beers, etc.
Nitrogen bubbles are smaller than CO2, so the mouthfeel of the pour is a bit "creamier." Also, the tiny bubbles lead to the "cascade" effect, of a glass full of froth morphing into dark, creamy brew. The glass then needs to be topped off, leading to the "double pour."
For independent study, grab an appropriate beverage and read this article - Good Beer Gas: Nitro Beers Explained
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