Review on 🥤 Soda CO2 Refill Connector Adapter: PERA Household Cylinder Accessories – CGA320 to TR21.4 by Roberto Tucker

This is as advertised; no more and no less. I was able to fill my SodaStream canister with this adapter on my CO2 tank after a few tries. When I first connected the adapter to the tank, I could hear gas escaping around the white plastic gasket on the side of the tank. I've read that some people have recommended using teflon tape on the threads, but others strongly disagree. I decided to attach it without tape and just reinstalled the gasket on the tank connector so it lined up nicely with the hole and re-tightened the adapter. No leak the second time. Make sure the seals are on the correct sides of the adapter: white plastic toward the CO2 canister, black rubber toward the SodaStream canister. Works perfectly!