To retain the taste the breweries intended, stout beers need to be dispensed with a stout type faucet, a 75% Nitrogen / 25% CO
2 gas blend, and a dispense pressure of 38 Lbs. As well you will require a keg coupler appropriate for the type of stout beer you will be dispensing.
The unique stout faucet has a built in stainless steel restricter plate that the beer is forced through creating the distinctive cascading head with these type of beers. This plate breaks the nitrogen out of the beer creating a cascading head on the poured beer.
The gas is a 75% Nitrogen / 25% CO
2 gas blend and is commonly referred to as Guinness gas. This gas blend is inappropriate for ales and lagers, as it will change the CO
2 content and thus the flavor of these beers.
Purchase cylinders of mixed gas locally. We recommend inquiring with the store you are getting your kegs from for a local source of mixed gas, or look in your phone book under Gas or Welding supply stores. Request gas that is used with beverages, and in a nitrogen cylinder with a female valve.
Although most bars and restaurants store their stout beers at the 36-38°F temperature (which is critical for most non-pasteurized ale and lager type of draft beers), most breweries recommend their stout beers are served at a temperature of 42°F to get the best flavor attributes of their product.
Always verify with your local beer distributor the brewery recommended temperature and type of gas for the beer you intend to dispense.
Choice of the "U" system keg coupler that is used for stout beers such as Guinness®, or the "S" system keg coupler that is used for stout beers such as Murphy's®.