tank threads ?

[rjack321]

In this country we have 3 threads in scuba tanks:
1/2" NPT (pretty ooold tanks)
7/8" NPS (3500 psi exemption series tanks made by PST for a few years)
3/4" NPS (95% of extant tanks including all steel and AL tanks currently distributed)

 

[phantomrfa]

Ok i was wrong they are 3/4 bspp G3/4 old uk spec . I see two side slung deco bottles being made up or my young boy can use them in pool training.Looks like i need two more tanks