you could try a local commercial plumbing places like bss they might do 22 mm 316 stainless tube for the mapress stuff but fittings are most likely compression. But there is a difference in tube diameter and pipe diameter one is from the inside and the other from the outside hope this helps
Just to clarify I'm looking for metric pipe with OD of 22 MM that will work with 22mm plumbing fittings. Not too fused about wall thickness of the pipe
I need it for an air intake on a new outdoor cooking device, SS would of have been good but expensive, does look like copper is esaiest solution. Will just coat it in HT paint like the rest of the project
yeah you can get 22 mm mapress fittings s/s carbon and copper all elbos 45s and couplers. But u need the press gun which can be a little pricey to rent