Learn to Brew Nylon Washers for Co2 Regulators, Set of 6

I use this in my drag car. Fits standard CGA 320 valves between the CO2 bottle and preset single gauge regulator on Precision Performance Products air shifter setups. Not for the dual gauge regulators that use a quad style O-ring. Although these are typically a one-time use item, the pack of six will last a long time since I only refill the CO2 bottle once a year.

This plastic / nylon gasket is the perfect and recommendable item to connect CO2 beer regulator to cylinder easily with no leaks. But must be installed correctly. Came in a pack of 6 units (mine came in red). Before installation, follow obviously, all security procedures (you're dealing with dangerous and under pressure materials), and make sure all valves and regulator are closed. Check the shape of this gasket and face the right side against cylinder connection. After that, use the wrench, but do not over tight regulator nut against cylinder connection. Open cylinder valve slowly and be sure there's no leaks at all. Then, one by one, depending on your setup, open other valves and regulator. Check for leaks. You can use a solution of soap and water. Spray around connections and check for bubbles. Or try to put all assembly under water and wait for possible bubbles, that means a leakage. For security reasons check for leaks in a regular basis. When replacing CO2 cylinder, discard used gasket. Install a new one.If you're not sure or familiarized with this procedures, take your regulator assembly and cylinder to a welding shop. They'll do it for you.After that, drink beer (responsibly) and be happy!

I bought these washers to get a better seal on my co2 tank/ regulator, and I've had no issues since. They fit right into my standard 5lb co2 tank, and keep my aquarium plants super happy.☆☆☆☆☆

Outside diameter in description: 0.25 inches.Outside diameter of product received: 0.75 inches.Does not work at all due to this.Amazon does not give an option to return, and Learn to Brew voicemail states they cannot accept calls.

I can't find these locally so mail order was the way to go. They seem slightly undersized as the regulator nut won't keep them from falling out when unscrewed (minor inconvenience).

I use CO2 on my fish tank as it's extremely heavily planted (literally wall to wall plants), and I run high lights and fertilizers on it as well. Anyway, you need something to create the proper seal between the regulator and the tank, and these have been extremely consistent so far. Works well, would purchase again.

Did not have the little ridges on the washers, they are completely smooth on both sides. I have not yet used them so I cannot say how well they work, but they were not what was shown in the picture and what I was expecting.

I believe at one point an alternative washer may have been sent out, but the correct washers were sent to me in April 2019. They have the ridge which fits nicely between the CGA 320 CO2 tank and my regulator for a leak free seal. And if you get the wrong ones by chance, send them back for free... I took a chance despite the neg reviews and was happy I did!