Sooooo.....I'm getting ready to go on a trip tomorrow and am preparing my tanks for the trip. (Always have back ups for your back-ups). I had loaned one of my Standard 22 to a friend and when I got it back today, I noticed that the washer that the metal cap rests on is bulging and mishappen. Unfortunately, I have lots of extra Orings but no washers. I don't have time to order one and am hoping to score one at a hardware store on the way out of town. I have the not so good one to use as a sample but am wondering if anyone knows what size I should ask for?
thanks much
thanks much