Soda Refill Bottle Co2 Adapter Refills Connector Kit for CGA320 to TR21-4,Soda Machine Soda Bottle Adapter Connector Adapter Accessories Replacement for (CGA320 to TR21.4)

Bought this to refill my drinkmate tank. My small tank has the "old" style top, with the narrow pin rather than the wider flat anti-refill top. This "old style" top is supposed to be easy to fill - connect everything up, open the valve, and let the gas flow. Initially, no matter what I tried I could not get CO2 to flow into the small tank from the large one. I unhooked the big tank from my kegerator, connected this adapter, threaded the small tank onto the adapter, inverted the setup, slowly opened the valve on the big tank, and could hear it open but nothing would flow. No amount of unhooking, reconnecting, releasing pressure, slowly opening, slowly threading the small tank on with gas flowing, or any other tricks would make it work. It is almost like there wasn’t enough pressure in the big tank to depress the pin and open the valve in the top of the small tank to allow things to equalize between the two. Frustrated, I hooked the big tank back to the beer keg and threw the small bottle back into the freezer. I tried again the next day, and it worked flawlessly. I don’t think I had the small tank cold enough when I initially tried it. My big tank is kept inside the beer cooler with the keg, and that may have meant I needed an even colder small tank? Whatever the science, I hooked it up today, inverted the setup, and as soon as I cracked the valve I heard the liquid flowing. Several seconds later it stopped, and after weighing the little bottle I had a 400 gram fill. Whole process was less than 3 minutes. Be sure your small tank is FROZEN!

Worked perfectly to save a lot of money now I can refill my ninja thirsty canisters instead of paying 10x the amount to purchase new.

Great item but don’t forget to take it off your tank when you return it or you’ll be over here like me buying a new one!! I initially bought a more complicated one with a hose and all but that one is not good. After I realized I lost this one I tried that one again and I am reminded why I bought this simple one. It’s great!

The issue I had was that the bottles I was trying to refill have a tamper tip (made up, I don’t know what it’s really called). The tip has a sort of button that needs to be depressed in order to refill the bottle, this item has no way of doing that. In addition, it didn’t seem machined that well, if that button wasn’t depressed and I opened the valve it should’ve just not filled the small tank, what it did was vent CO2 through all of the gaps in the part. I ultimately went with a different brand that I got to work.

This is a good-quality, heavy-duty adapter. You will need one like this to refill your own Sodastream cartridges, which you absolutely should do because the refill prices on them through exchanges or buying new ones are murder. I use the adapter to connect to this - https://www.amazon.com/dp/B00IE1DJ2I - 5 pound tank, and it works easily and properly. The threads are good, and the piece itself is of a heavy weight. I expect this to last forever, basically. I should say that the spare o-rings that came with it, at least mine, are absolute junk (hard plastic) that don't fit at all. I guess someone stuck the wrong thing in the package. It's easy enough to find replacements if you should ever need them, though.

So this works well on the old blue style SodaStream CO2 canisters BUT when you open the CO2 valve to fill you have to crank it open 1 mm at a time VERY slowly until you hear the CO2 going into the bottle and then stop cuz it only refills if you go super super slowly and it takes a couple minutes for it to refill but you can hear it. If you open it even a little more it will stop due to the safety valve and then you'll have to start over by closing the tank valve and then releasing the adapter pressure and then tightening the adapter pressure knob and then once again open the CO2 canister super duper slowly like amazingly slow until you hear the flow. Also there is a brass filter in there that originally I thought was blocking the flow but it's just a filter. I poked it out with a screwdriver. You can pop it out or leave it in it's supposed to filter impurities from your CO2 source Also I froze the canister overnight and I now have a full pound filling the CO2 canister. It's even more C02 than you get directly from SodaStreams canisters 🤠

I refilled my Drinkmate cylinder within 5 minutes of this arriving on my doorstep. Mine did have the integrated filter, unlike another reviewer's. I'd already had an empty 5lb CO2 tank from my home brewing days. I traded it for a full tank at my local gas supplier (Roberts Oxygen) for $35 (the price of a new, little Drinkmate canister)! All of their CO2 is food grade. My process: 1. Weigh my empty canister (706g). Check my canister's capacity (410g). Target weight: 1116g. 2. Freeze canister. (Or skip for a less complete fill.) 3. Attach adapter hand-tight to 5lb tank. 4. Screw empty canister to adapter. 5. Invert the whole assembly (since my big tank is a normal one--not a siphon tube tank made for refilling). 6. Slowly release big tank's valve. [However, I've read that the slow ramp up is unnecessary for Drinkmate and older (blue) Soda Stream canisters, which this adapter fits.] 7. Wait for the hissing sound of transfer to stop (it only took around 10 seconds). 8. Close the valve on the big tank. 9. Unscrew filled canister from assembly. I weighed the filled canister at 1168g, which is a little past a complete fill (~105%). That's a result of preparing a fully chilled canister. Next time, I may skip the measurement since I landed close to the target. I can make a few drinks right away to purge the small overage.

Works, but the small orings for the pressure release blow out every time you fill a cylinder.

Very simple. No strange taste. Dial is only for releasing trapped gas after the large tank valve has been closed. If valve of tank is opened more then a little the soda stream tank won’t fill. Chilling bottles first helps them fill more. Comes with extra gaskets.

Item was leaking had to send back

returned ........ inside part missing no way to fill a tank