READ THIS FOR PROPER INSTRUCTION ON USAGE
After a lot of online research and contacting morebeer support (they couldn't really answer my questions), I wrote out detailed instructions for myself on how to accurately and properly use this carbonating lid and stone. This should get your beer perfectly carbonated every time. The problem is that the instructions that come with the lid do not explain wetting pressure, and if followed, you will almost always come away with under-carbonated beer. Wetting pressure is the PSI threshold for bubbles to start coming out of the stone. If the wetting pressure is a typical 4 PSI, and you give the stone 2 PSI of CO2, no bubbles will come out, like they would if you were just adding CO2 to the headspace of the keg via the body connect (IN). THIS IS CRUCIAL. You can find your wetting pressure by submerging the stone in a glass of water (connected to lid line, and gas connected to lid port). Slowly crank the PSI on the regulator until bubbles start coming out - when they start coming out of the stone, note the PSI on the regulator and that is your wetting pressure. I hope this helps!
1. Keg beer and use carbonating stone LID. Use keg lube for rubber gasket on this lid and make sure
to get a good seal before purging and before setting lid with handle lever.
2. Connect CO2 line directly onto the gas-in port on THE KEG, not on the lid. Do this while sealing, purging,
and setting. Set final pressure around 10 psi and leave for 40-48 hours (cold crash). The carbonation stone will not work
well until the beer is at your target temperature.
3. After 40-48 hours, turn off small gas valve (under regulator), but do not disconnect gas line from keg (yet). SLOWLY bleed
CO2 pressure from keg until there is no pressure. Now, purge gas from REGULATOR itself with the regulator's pressure relief
valve, and then set regulator to about 4 psi. Now open small gas valve to let 4 psi of gas enter keg (keg body connect still,
NOT lid port to carbonation stone). Slowly purge keg a few times with this 4 psi. After purging, let 4 psi sit for 5 minutes.
4. Now, with 4 psi in the headspace of the keg, first close the small gas valve and disconnect gas from keg. Now completely
purge the gas from the REGULATOR and turn regulator NOB to the left so zero gas is entering/will enter regulator.
5. Turn on small gas valve (no CO2 will enter line) and connect the gas to the LID PORT (to carb stone).
6. Slowly (take about 1 minute to do this) turn regulator NOB to the right until you hit 4 psi. *This is the wetting pressure for my
stone, yours may be different, but is likely around 4 psi* Let sit for 1 minute. After 1 minute, raise to 6 psi. Leave at 6 psi for 1
hour (and check a couple times in the first 10 minutes to make sure it is holding at 6 psi).
7. After 1 hour at a steady 6 psi, slowly raise to 8 psi. Do this every hour until the final desired psi is reached.
The wetting pressure of my carbonation stone is roughly 4 psi, so for example, if you want to reach 12 psi @ 40
degrees F, you will need the final psi on the regulator to be 16 psi (12 psi + 4 psi wetting pressure).
8. Leave at final PSI for 3 full days (I do this to be safe and let it age a bit more, but you should at least leave for 36 hours IMO),
and check periodically to make sure the psi is holding.
9. After 3 days (or my recommended minimum of 36 hours), turn off small gas valve and purge the REGULATOR of CO2 (not the
keg). Turn nob to the left so that no gas will enter the regulator or line. Disconnect the gas line from the KEG LID PORT. Turn
on the small gas valve and connect gas line to KEG BODY CONNECT (IN). Check regulator gauge - make sure it reads the
correct PSI you were aiming for. If it was 16 psi when connected to the KEG LID PORT (carb stone), it should now read right
around 12 PSI when connected to the KEG BODY CONNECT (IN). If this is the case, good job! It worked.
10. Now slowly bleed the CO2 from the keg and replace the carbonating lid with a normal keg lid (again use keg lube
on rubber gasket of normal lid). Seal lid and purge CO2 a few times to be safe. Set Regulator at desired PSI -
which would be 12 PSI from our previous example. Let sit at 12 PSI for 2 full days with normal lid on (again, this is my safe
personal preference, not necessary).
11. After 2 days, connect the LIQUID OUT LINE and pour a pint! Check for correct carbonation. If carbonation and taste
are both good, beer is ready to drink and bottle!
Notes: I wrote these instructions out in such a way that you might say "duh" or "you don't need to explain that part" - but I wanted
it to be comprehensive because every step is important and generally it's just good to have detailed notes. You also
might be thinking "jeez, this makes it seem very difficult and cumbersome, should I even use one of these?" Well, once
you've carbonated this way once or twice, I'd be surprised if you still wanted to use the "set and forget" method or the
method of cranking up the PSI to 30 and shaking. This is how commercial breweries carbonate their beer (on a larger
scale) and it's well worth learning and using this method. It will become easy as cake and satisfying after the first 1-2
attempts. Small bubbles, perfect carbonation in 4-6 days from initial kegging, and professional. You can also have
the beer carbonated in just 3 days as well using these instructions by just cutting down on cold crash time,
stone carbonating time, and by not replacing lid with normal lid. I just prefer switching to a normal lid for longer term
storage. Good Luck!