- It is much more likely for a beer left at a high psi to overcarbonate (become foamy) than a beer left at a low psi to lose carbonation. The reason is that gas will always keep coming from the regulator until the gas/beer pressure have reached an equilibrium, so over time the high psi setting becomes the pressure in the beer. However, for a beer to lose carbonation it has to come out of solution into the headspace in the keg. Because the headspace is limited, only so much CO2 can come out, and the keg pressure will not drop all the way down to the lower regulator pressure on its own. This is the reason that if you have overcarbonated a beer you have to repeatedly vent the keg, reducing the pressure in the headspace to 0, and allowing more gas to escape from the beer.
- For the best performance when using a draft box, tests have shown that ice water is actually the most effective at cooling the coils. So, as the ice melts, DO NOT OPEN THE VALVE ON THE COOLER. Draft boxes with Cooling Plates (stainless coil embedded in aluminum) are designed to work with the valve open, ours is not.