Long Island Clinton Wielding. I used to get my CO2 refilled there ONLY when I needed to visit my niece once a week, but the drive there can be long even from Brooklyn. It is only $5 cheaper than Liberty Gas. Pretty much anywhere in NYC you have to swap your tank. It is really not a big deal. I get my tank exchange at Liberty Gas. I always get a nice shinny alu tank. It really does not matter since my tank is inside and underneath my tank. As long as they don't leak CO2, it is fine by me. If you are in Manhattan, I think there are few places you can go.