PERA Household Soda Bottle Soda Water Cylinder CO2 Refill Connector Adapter Accessories,Soda CO2 Adapter CGA320 to TR21.4

Product arrived on time with no damage (plus for the seller). The item is just as advertised, and if you follow the directions in the video on how to fill a little tank from your 5-10-20 pound bottle (yes, upside-down) it works perfectly.A couple of items worth mentioning and some cautionary notes:1) The bottle you are filling needs to be certified, so check the last time the bottle was static tested. Don't fill a bottle if the certification had expired.2) There are no directions, so make sure you put in the O-Rings that come with the adapter. The black rubber one on the pony bottle side, and the white nylon one on the supply bottle side.3) MAKE SURE you put your little pony bottle in the freezer for the night before filling it. This is critical to get liquid in your pony bottle, not just gas.4) After filling my first two bottles, I noted that my full bottle was a deal higher than the standard fill I got with exchanging bottles..5) Lastly, this is highly pressurized gas, treat it as such. Wear PPE, and don't play around or allow the bottles to tip over or to fall off the bench, you might really regret it .

Finally an easy way to refill them. I tried the hose adapter to go from my homebrew CO2 tank straight to the Sodastream, but it ended up tasting like factory. Rather than making one myself which is clean, I first tried this adapter for a refill option. Welp it is easy enough that I'm done - this is my pandemic sodastream solution. The bottles end up with WAY MORE gas this way than when you buy the refills at the store, they last way longer.And it goes a little something like this:1 - Empty bottle to be refilled goes in the freezer overnight. I tried with one in the freezer for just a few minutes and it worked fine, just held less gas. I keep an empty in the freezer all the time now. General gas equation PV=nRT means colder bottle holds more gas.2 - Install the o-rings right (white washer on tank side, black o-ring on sodastream bottle side, and the little o-ring for the vent valve). I applied a thin film of keg lube on the washers and rings because why not.3 - Crank the adapter onto your source CO2 tank, with valves shut on the tank and the vent valve on the adapter. Use a wrench on the tank connection. You can leave it on the source CO2 tank until you want to use the tank for something else.4 - Crank the frozen empty bottle onto the open end of the adapter, hand tight like in the sodastream machine.5 - If you have a regular homebrew CO2 tank like me, you have to hold it upside down so the liquid CO2 wants to fall into the frozen bottle. Then you open the tank valve VERY SLOWLY until you hear the CO2 flowing. You can open it wider slowly once you hear flow, but if you open too much too fast it will trigger an interlock in the bottle pin and shut off the flow completely. Just fill it slowly, takes about two minutes but you're saving mad cash.6 - Once you think you've filled it, shut off your tank valve. Then open the vent valve on the adapter to release the compressed gas inside the adapter and allow the bottle pin to shut (pressure holds it open for this refill process, nothing touches that center pin). Then take off your newly-refilled bottle and wonder at its weight. In fact, I always use a food scale to measure the bottle empty and full, to reassure myself.The sodastream bottles last us at least two or three times as long as a refill as compared to when they're new refills from the store. Mmmhmmm.... Go. Figure.

So, I took this to my local paintball shop and we spent an evening trying to fill it up. We did everything as instructed in the reviews. We turned over the tank, we used the o-rings, the bottles were real cold. It did not work. Not even opening the big tank slowly. The pressure inside the adaptor is not enough to refill the bottle. Total fail.Would not recommend. just caved in and got a 20oz paintball tank and used that instead.

I bought this so I could refill my sodastream CO2 tank from my 5 lb home brew CO2 tank. It works well enough, but I also don’t get a full charge in the sodastream tank. I usually find I can carbonate about ten 1L bottles before the pressure drops noticeably. Of course I have everything I need to refill it again so its not a terrible thing, just slightly annoying.NOTE: I have noticed that not all sodastream CO2 tanks are created equal. If you look at the picture I uploaded this works on the tank with the small diameter pointed plunger valve but not for the large diameter flat plunger valve. It seems that the pressure is distributed too much on the large plunger valve to get it to depress.

This works to fill bottles, but dont use the small pressure relief dial.. the little rubber gasket will fail, and will leak constantly. Luckily they include several so you can replace it, thus 3 stars. Just loosen bottle and watch your hands or wear gloves, making sure of course you have closed the valve on your main tank first.

This serves its intended purpose as advertised; nothing more, nothing less. I was able to fill my SodaStream canister using this adapter on my CO2 tank after a couple tries. The first time I mated the adapter to the tank, I could hear gas leaking around the white plastic gasket on the tank side. I read where some people recommended using teflon tape on the threads, but others strongly discouraged that. I decided to try to fix it without tape and simply re-seated the gasket on the tank fitting so it lined up with the hole nicely and tightened the adapter back on. No leaks the second time. Be sure to get the gaskets on the correct sides of the adapter: white plastic toward the CO2 tank, black rubber toward the SodaStream canister. Works great!