Beer barb is 1/4". Gas barb is 5/16". We think our Counter Pressure Filler is the best on the market and the Deluxe Counter Pressure Filler takes a proven design to the next level by adding a pressure gauge for monitoring bottle pressure and flared connections for easy cleaning. The gauge allows you to know the pressure in your bottle, an incredibly handy feature. The flared connections allow for easy cleaning as you can connect on or disconnect your lines in a matter of seconds. Traditionally these lines can be difficult to sanitize because they were permanently connected with hose clamps. Still has all the great feature of our original All Stainless Construction (except for a brass backing on the pressure gauge) A true Counter Pressure Filler (for less foaming) Easy to use Stainless 3-way ball valve on top Adjustable Stainless pressure release on side Flushes bottle from the bottom not the top What is a Counter Pressure Filler? If you currently carbonate and store your homebrew in kegs, you can use a counter pressure filler to bottle beer directly from your kegs. One huge advantage of this method is that since you are bottling already carbonated, clear beer, there will be no sediment at the bottom of your bottles. Counter pressure filling is how a brewery bottles beer. The bottle is under pressure while the carbonated beer flows in. Because the interior of the bottle is pressurized there is minimal loss of the CO2 in solution. The opposite of filling under pressure is when you pour a beer into a pint glass where CO2 erupts out of solution creating all that foam. Great in your glass but not good when you are trying to bottle carbonated beer. Our counter pressure filler mimics a single filling head on a professional bottling line, a concept that we all know works very, very well. A Short Video on the Original KEG801 Counter Pressure Filler Find more videos like this on morebeer Features While some models flush the bottle from the top and fill from the bottom, our unit features a special valve that allows CO2 and beer to flow down the same stainless tube, directly to the bottom of the bottle. First CO2 flows down into the bottom of the bottle to flush from the bottom up. Next you switch the valve position and beer flows down the same tube, filling from the bottom up. The result is a more effective purging of oxygen and no foam during the filling process - not to mention that the whole thing takes one-hand to operate! Why hope that you flushed your bottle properly using a type of beer gun, when you can know for sure that you have created the best environment for your beer to be stored at by using a Counter Pressure Bottle Filler? More Details The unit is inserted into the bottle in the off position. The valve is then turned to CO2 to flush the bottle and then to beer for filling. The adjustable pressure relief on the side of the unit allows you control the speed of fill by adjusting the pressure in the bottle. The valve is positioned in such a way that it is easy to use with one hand, while the other holds the bottle. This model is designed for 12oz bottles but can easily be extended to accommodate larger bottles, such as 22oz, with a small piece of 1/4" tubing. Setting Your PSI Pressure Before you counter pressure fill a bottle make sure you are satisfied with the carbonation level and flavor. The goal for counter pressure bottle filling is to store your beer in the most sanitary and clean environment possible so when you get ready to share your homebrew its presentation is perfect when you go to pour. An ideal set point to set your PSI level on your regulator is 10-14 psi. This range is dependent upon the temperature of your beer and the carbonation level. We recommend you start at a lower pressure around 10psi for the first 2-3 bottles to make sure you get everything dialed in before committing to filling a whole case. Make sure your keg is always kept cold. If your keg warms up you will have foaming issues.