Pressure regulators

Pressure regulators are needed to apply and control the correct pressure to the beer. Most commonly used regulator is a one-way type but regulators can also be serial connected to allow individual pressure control for each beer in larger installations. 

It is well known that draft beer, when tapped, often gives more foam than desired. The major (but not always the only) cause of this is due to incorrect CO2 pressure in the beer keg in relation to the temperature of the beer. Some people adjust CO2 pressure manually when the temperature increases or decreases, but people do not always remember to do this or adjust it correctly. Manual adjustment (and inaccurate setting) can lead to over carbonated beer (too much foam) or under carbonated (flat) beer.