My local hardware store stocks 15mm diameter galvanised pipe fittings and lengths of galvanised pipe with threaded ends. The annoying thing is they charge $7 for a 100mm length of pipe but $16 for a 900mm length. I bought a 900mm length thinking I'd get a die set and cut and thread my own lengths.
The hardware store didn't stock and dies big enough for 15mm pipe. I've spent the last two evenings searching around for a pipe threading set with a die for 15mm pipe but can't seem to find such an item. Most of the dies I've come across are in inches rather than mm which I suspect won't work with the fittings I've got.
Can anyone give me any pointers as to whether a pipe threading tool for 15mm diameter pipe really is that exotic or where such beasties are likely to be found?