Omari Gates
Changing a beer keg in Australia is a simple process, but it must be done systematically to maintain freshness and flavour. Before changing a keg, it is important to confirm that it is empty. To do this, open the faucet of the tap—if frothy beer comes out or none at all, the keg is empty. Next, turn off the CO2 line, if the keg has one. Then, lift the coupler handle at the base of the tap and remove the coupler by rotating it counter-clockwise. Move the empty keg aside and put the new keg in a refrigeration unit or a tub of ice. Finally, fit the tap onto the new keg, twist it clockwise, and turn the CO2 back on.
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What You'll Learn
Check if the keg is empty
There are several ways to check if a beer keg is empty. One way is to use a scale to weigh the keg and determine how much beer is left. This can be done by first weighing an empty keg and recording that weight. Then, weigh the partially filled keg and enter that weight into a tool that will calculate the estimated volume of beer remaining. This can be done using a grain scale or a digital scale.
Another method is to use a system like Ball and Keg, which uses a larger float ball with an internal magnet that is dropped into the keg. The ball floats against the sidewall, and a smaller magnet on the outside of the keg acts as a level indicator when the two balls come together. This system is simple and effective for homebrew-style Cornelius kegs, but it is not suitable for commercial Sanke-style kegs.
A similar system is the Brewskey system, which tracks and measures every pour, sending out low-beer alerts and other time-sensitive messages. This system connects to the internet via WiFi and uses NFC to authenticate and track each pour.
Additionally, some people suggest pulling the keg out and letting it warm up for a few minutes, as the condensation will be more apparent and indicate the level of liquid inside. This method may not be as accurate as using a scale but can provide a general idea of how much beer is left.
For commercial purposes, there are devices like the Keg Level Checker Tool, which uses gravity and weight-based measurements to monitor the amount of beer left in a standard U.S. keg.
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Turn off the CO2 line
Turning off the CO2 line is an important step when changing a beer keg. It is one of the first steps to take, after ensuring that the keg is empty. If your keg has a CO2 line, it will have a CO2 tank that helps to maintain pressure inside the keg and aids in dispensing the beer. The gas from the CO2 line also helps the beer to retain its natural carbonation.
To turn off the CO2 line, locate the CO2 regulator or reducing valve. This is usually found near the CO2 tank, which is often stored either inside or outside the kegerator cabinet. The regulator is an essential part of the kegerator dispense system, as it helps to monitor and regulate the CO2 pressure. It connects to the air line and reads the pressure of the CO2 tank.
Once you have located the regulator, you will need to turn off the CO2 supply. This is usually done by closing a valve or turning a knob or switch. The specific mechanism will depend on the type of regulator or valve you have. Make sure to refer to your product manual or seek guidance from a qualified technician if you are unsure.
It is important to exercise caution when dealing with CO2. Always follow safety guidelines, such as keeping the gas cylinders secure and upright, avoiding heat sources, and ventilating the area if there is any leakage.
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Remove the coupler
To remove the coupler, start by turning off the CO2 line if your keg has one. This will help prevent gas from being released when you remove the coupler. You can then lift the coupler handle at the base of the tap and rotate it counter-clockwise to remove the empty keg. If your coupler has a relief valve with a pull ring, make sure to shut off the gas and vent the CO2 before removing the coupler.
If you're having trouble removing the coupler, there may be a few things to keep in mind. First, check that the handle is locked into the upright position. This should stop the gas from being released. If this doesn't work, try using two small screwdrivers to turn the inner part of the coupler clockwise. Poke them into the holes on opposite sides, lift upwards, and turn. The coupler should then unlock from the lugs and drop down into the keg. You can then unscrew the top, leaving the spear behind.
It's important to regularly clean your coupler to maintain the quality of your beer. When cleaning, remove the coupler and all of its parts from the tap. Disassemble the coupler and soak the parts in a cleaning solution before brushing and rinsing them thoroughly. Check that all seals are in good condition and replace any that are damaged or worn out.
Additionally, it's worth noting that different types of beer may require different types of couplers. Make sure to match the beer you're using with the appropriate coupler to ensure a proper fit and avoid any issues with dispensing.
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Clean the coupler
Before cleaning the coupler, it is important to turn off the CO2 or nitrogen supply to the keg to prevent any accidental dispensing of beer. Next, carefully remove the air line from the coupler and set aside the Thomas valve and retainer. Then, detach the beer line from the coupler, being cautious of any spills.
Now, you can start cleaning the coupler. First, disassemble the coupler by pulling out the probe and removing the gasket at the end of the probe. Check the ball valve retainer and the check ball valve. The coupler should now be completely disassembled. Place all the parts into a caustic solution and let them soak for at least 15 minutes. This deep cleaning step helps prevent the formation of beer stones, which are mineral deposits that can affect the taste of the beer. After soaking, thoroughly rinse the parts with cold water and dry them.
Additionally, inspect the gaskets on the coupler, especially the large gasket or bottom seal, as these are crucial to the coupler's functionality. You can use a brush to scrub the coupler and remove any build-up. Soaking and scrubbing the coupler will ensure that harmful microorganisms, yeast, mould, and bacteria are removed.
Once the coupler is clean and dry, it's time to reassemble it. Slide the probe back into the body of the coupler, ensuring it is properly seated. Then, slide the handle over the probe and align the hinge pin holes. Insert the hinge pin and tighten the nut, being careful not to overtighten. Finally, replace the Thomas valve and retainer, ensuring they are secure.
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Install a new keg
Before installing a new keg, it is important to confirm that the old keg is empty. You can do this by opening the faucet of the tap—if very frothy beer comes out or none at all, the keg is empty. If the beer coughs and sputters out of the tap, you can also be fairly certain the keg is empty.
Now, locate the new keg of beer you want to attach. At the top of the keg where the coupler fits, there is usually a plastic cover—remove it.
Next, line up the grooves or lug slots on the coupler and the keg connector well. Press down on the coupler itself (not the beer lines) and twist a quarter to a half-turn clockwise. When the coupler has been seated correctly into the well, you will feel a firm connection. Depress the handle back down into place.
Now, turn the gas supply back on. When you first change a keg, the beer lines will still have some of the previous beer in them. Depending on the length of the beer lines from the keg to your tap, you may have to pour a pint or two to clear the old beer out.
Finally, open the faucet fully to expel excess foam that is often built up in freshly tapped kegs. Make sure the beer flows through the faucet and there are no obvious leaks.
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Frequently asked questions
Open the faucet of the tap. If very frothy beer comes out or none at all, the keg is empty.
Never have your face directly above the coupler or connector. Always keep your head to the side of the keg. Beer can spray upwards and, in rare cases, the coupler can eject upwards.
First, turn off the gas. Then, lift the coupler handle and twist it counter-clockwise. Pull the coupler straight up.
Remove the plastic cover from the top of the keg. Slide the coupler into place and twist it clockwise to lock it. Depress the handle and turn the gas back on.
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