Most times you have to take it to a company that does that sort of thing. Fyr-fighter Co. comes to mind. For the small ones, it can cost more than just buying a new one. Call them and check prices then check Sears or HomeDepot for new prices. And yean, I keep a large one mounted on the wall in hte garage and a couple more up in the house). Probably just the ex-firefighter in me. It takes so little to put out a fire in the first 5-10 minutes, and so mush 10 minutes after that. Good job on having one handy. Most welders I know are smart like that.