Hopefully Gas regulators aren't something you need to replace often. However, they can get damaged and they do go out of date. So at some point you should and will replace them. Thankfully ours are a great price. 

Gas welding is a dying art but we still stock equipment for it, and gas rods, if you are still using this process.

We also keep in all the little things that you may find hard to source - nuts, tails, cutting head nuts, gas nozzles, O-Cips
We have had customers tell us that it is hard to find Swaged nozzles and Lightweight nozzles - we stock all sizes, along with the cutting attachments, shanks and mixers