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)

So far I've refilled atleast 6 Soda Stream CO2 bottles (screw type, not quick connect). Make sure you put your empty bottles in the freezer for 8-12 hours before you fill them to get the highest fill amount.

I bought this for the same reason everyone else bought theirs... I use mine to refill ninja Thirsti co2 containers and it works great. It only costs $70 to refill a 20 gallon tank of co2. I have been using the 20 gallon tank going on months using the ninja thirsti daily/multiple times a day. Great product and highly recommended!

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!

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.

It took me a while to get it to work even with tips from others. Here is what I did to get mostly full (95%?) bottles: 1 tighten adapter on to supply tank to the point it doesn't leat from that side 2. First put in freezer for a few hours and then screw on the sodastream CO2 bottle to hand tight and then back off so CO2 ca escape when supply tank is opened 3. Open CO2 supply and then back off so the flow is very light but handle turning will not suddenly jump the pressure up 4. Tighten on the sodastream tank all the way 5. Open the main tank very slowly - should hear sodastream tank filling 6. Leave for a few minutes and then shut valves and remove when filling sound is no longer evident 6a. A brand new filled sodastream tank weighs 1150ish g and an empty one is 750ish 7. A first fill gets me to 850-900 g. It took me three freeze/fill cycles to get to 1100+ g. 8. For me the thrill of beating the systems makes it somewhat worth it. I got a 20 lb CO2 tank and it costs me 35 dollars to exchange locally for a full tank. My estimate is $2/bottle to fill. I have a local shop that will fill sodastream CO2 bottles for 5. I think of you have that locally and can get your hands on 3-4 empty soda stream CO2 bottles, it might be a better way to go.

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 🤠

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!

Works well with soda stream but doesnt fill it all the way i have the ones with the anti fill valve and it barley fills the tank even when refrigerated.

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.

I was having a difficult/impossible time filling my Sodastream cylinder. Noting the comments that there is no pin depressor on the adapter, yet it worked for some people and not others, I finally figured it out. There is an newer-style flatter depressor pin (left) on some cylinders, and an older-style thinner depressor pin (right) on other cylinders. This adapter works perfectly with the older-style thinner pins. Apparently the newer, flatter pins are designed to make refilling in this way more difficult or impossible.

On testing, CO2 flows from my full CGA320 donor tank through the adaptor, but nothing enters the empty TR21-4 SodaStream cylinder when it is attached… even trying to only open the main CO2 flow a slight turn (for less pressure) fails to fill the sodastream tank as suggested in the Amazon seller photos... THE PROBLEM: 1. The receiving side has no visible adjustable valve-depressor pin, and the instructions do not explain how the cylinder’s spring-loaded valve is supposed to open. 2. Even if it worked there is no way to gauge how full the soda-tank is getting which may “blow” the safety bleed valve. I will try filling again with the slight turn of 20lb tank-valve but so far no success on my first 3 attempts…

My local store had no refills for my ninja thirsty cylinder. I had a full co2 tank. This paid for itself after filling 2 ninja thirsty cylinders.

Item was leaking had to send back