Does it really matter what gas and pressure I use on my beer kegs?

Absolutely! The correct gas mix and gas pressures will dictate the profitability of your draught beer system. Improper gas types or mixes and incorrect gas pressures will cause undesirable outcomes including over-carbonation, foamy beer, flat beer and general customer dissatisfaction.

In most situations tuning a draught beer system to 2 oz per second at the beer faucet is a base line to start with.Adjust keg pressure such that a 16 oz pint is filled in 7-9 seconds. Generally speaking this will give you the correct keg pressure.

That gauge pressure can then be used to determine the correct gas blend. Call GAS for assistance anytime!


Is the mix of 70% CO2/30% nitrogen right for my beer?

Not unless you have exactly 24 pounds of keg pressure and your keg cooler keeps a 38F beer temperature. In reality no one blend is correct for all draught beer system conditions.

The correct method for blend calculation is tuning the blend to the given draught system’s conditions i.e. Keg temp, keg pressure and beer type

We invite these conversations and really enjoy having them!

Please call us anytime to talk draught beer quality!


Is the mix of 25% CO2/75% nitrogen right for my non-stout beers?

While 25% CO2 is perfect for your stout creamed beers it is absolutely not acceptable for any normal ale or lager type of beer. The result will be under carbonated or flat beer.

The perfect ratio of CO2/ nitrogen is customized for your exact draught beer system. Typically 50-85% CO2 will be the range for most long draw beer keg systems. Each beer system has its own ideal mix ratio to deliver the perfect pint. Green Air Supply’s Beer Quality Experts can calculate your ideal gas mix and assist you in how to increase your draught beer system profits.

How often should my draught beer lines be cleaned and why should I clean them?

The Craft Brewers Association prescribes that draught beer lines should be cleaned every two weeks. Proper beer line cleaning is essential for maintaining fresh and correct tasting draught beer. Improper cleaning frequency and/or cleaning methods can increase beer foam and will make it difficult to achieve the Perfect Pour.  As your quality draught beer partner, Green Air Supply can assist you in finding reputable beer line cleaning companies in your local area.

What temperature should my keg cooler ideally be?

As a general rule of thumb, beer kegs should be stored at a consistent 38F. If warmer or colder beer dispense is desired, please contact one of our Beverage Dispense experts to advise you in how to accomplish this without causing flat or foamy beer. In most cases, mixed gas from Green Air Supply Nitrogen Separators can help compensate for temperatures outside the normal range.

What should the proper head size be for my pint glass?

To maximize your kegged beer profits and to provide the best customer satisfaction a 16 oz pint glass should have a 1″ head. The head on a pint of beer increases aroma and provides a nice mouth feel for greater customer satisfaction. The head on a pint also saves approximately 1.5 oz of beer on each pint poured. A perfect pint equals maximum profit!Ask us about our marked pint glasses!