Maybe an strange place to ask but I have googled and got no simple anwer. I just want to know what the thread is on the output side of a standard pub type CO2 gas bottle. From what I have looked at it would seem it is 5/8" BSP but not really clear, does anyone know for certain.
Belatucadras, thank you for trying to help but that is the sort of information I was finding when I looked myself, it is unclear and confusing. what I need to know whether the male thread on the outlet from the valve is 5/8" BSP or not. The size of the thread to the cylinder itself does not matter. There may of course be different threads on the out side of different valves, this is what I am trying to clarify before buying the wrong fitting.
wee eddie, nothing wrong with your memory, I asked the same question a long time back. Never did find the answer here or on Google, gave up in the end as not that important at the time but someone must know surely. It does not seem an unreasonable question to me. If it is easy then someone tell me the answer or where to find it that gives a straight forward answer "is it 5/8" bsp or not" if not what is it, anwers like BS341, DIN477, GCA320 are meaningless to me.
I originally had a CO2 bottle with a small adaptor on it which I could connect my freezing kit to. When I changed the bottle I did not think to take off the adaptor so that is what I need, the pub type adapters are not suitable.