Quote Originally Posted by Rich
Our club has got a twin set with two 4 litre bottles commoned together, so it's not possible to fill one and not the other. They are physically joined at the handle and with a figure of eight clamp near the base.

Initially we had an issue with the dive shop who wanted to charge us for filling TWO bottles, but when he realised there was a fair number of club members who might be influenced by his approach he agreed it only counts as one bottle.

We buy a pre-paid card for £12 and that allows us 5 fills to 300 bar - any size bottle. Each time they fill a bottle they punch a hole in the card. 5 holes, card is empty. Save 5 cards, get a free fill.
Ah, Lovely Devon