Whichever it is that can be undone by hand tools. Think it might be blue, not 100% though.cheers mate just wanted to make sure.ps want colour is best or does it not matter.p.s u still going balling on sunday at necton mate.
loct tight ???? PTFE tape mate much better. It's also used on dive regs. Any b & q plumbing section. Lock tight ant half a pig to get the thing back out if you need to. Use an adjustable spanner
You should never use loctite or PTFE tape on Dive regs They need nothing more than the O ring and pressure to seal them also you shouldnt be using an adjustable spanner to remove a fill nipple just get the right size spanner otherwise you'll end up rounding of the nutloct tight ???? PTFE tape mate much better. It's also used on dive regs. Any b & q plumbing section. Lock tight ant half a pig to get the thing back out if you need to. Use an adjustable spanner