Leaderboard

No one local would fill mine as they need to be NZ registered and certified - seems odd if they are available as close as Aussie and no manufacturer has bother to register them here as corrision on steel ones in a marine environment is an issue

The bottle on our boat is aluminium with a brass neck fitting sold to me as a refurbished unit by Tank Test Laboratories in Puhinui Rd, I have painted it and keep the neck treated with Lanocote but as already commented you would think it would be of equal concern since I have seen dissimilar metal corrosion cause cracks in thick aluminium, particularly cast material.

It was a phone conversation with work safe last year that told me the problem was a requirement for a tapered thread valve and the possibility that a tapered thread in a fibreglass bottle would split the neck open. At the time they would not consider a parallel thread and o-ring... I suspect the guy was also worried at the possibility someone might try and use an incorrect thread. But would love to be proven wrong, or opinions to be changed, I would still like to buy a couple of bottles if I could get them refilled.

Is actually really easy to transfer even without inverting or venting, have a short hose HP hose between bottles... leave both bottles upright, open valves and then place the one you want to fill in the fridge or freezer. Watch the level closely, it will fill totally and leave no vapour space, close the valves to stop the transfer before this happens.