A friend of mine has recently given me some slightly used 20mm PVC ducting pipe.
Theres 60m of 20mm white cable duct in 6m lengths and 24m of 20mm green cable duct.
Now if I were using pvc pipe to make weapons I’d normally use PVC pressure pipe, which is the best suited to weapons as the coloured stuff is either too flexible or too brittle (although I have seen it used for weapons).
I am not sure how the white duct is the same grade as the pressure pipe but I am guessing it will be close enough to be weapon grade. Its not the best for swords (unless you can flatten it - you heat it up and squish it, though even then it makes heavy swords) but does suit hafted weapons quite well (maces, hammers, staves, spears, javelins).
From experience 20mm is ok for weapons up to about 1.5m long like staves and spears or 1.0m for maces and axes.
It is also useful for making props as well.
It is currently sitting at my friends place, I will probably cut it into 2m and 4m lengths for transporting it.
Let me know if you would like some, I’ll see if I can find a way of sending it to you, maybe I can courier some up to somewhere central in Auckland. Otherwise it’ll be in Hamilton until I come up to Auckland next.