The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair.
Over say 5 years owning a cylinder is going to cost you about £300 and you can probably get £70-£100 back at the end - so it is only worth hiring if you dive less than 3 times a year at these rates; £10 a hire doubles that. Most divers will easily pass that which is why almost no one hires as a stand alone business except in places where the divers are all tourists or can't bring cylinders for some other reason - like they live in a flat with no room to store them.
Last edited by Energy58; 04-02-2020 at 02:22 PM.
My maths is crap but I got 2 x 10l cylinders new in 2005 for £300. Before that I had some dirt cheap ex-dive school cylinders for £15 each.. Doing 50 odd dives a year with some free fills (good friends and work stuff) and some £3-£4 fills since I stopped instructing, I think it worked out cheaper than renting. I've stopped getting them 02 tested because if I need Nitrox, I need 12 litre or 15 litre cylinders and these are in the shed. That's another calculation. I now live by the sea and that means if the weather is good, and I have a day off, I'm going diving. Full cylinder ready to go in the shed all the time. If I rented a cylinder every dive over 15 years at £10 or even £5 per dive day I'd be over 3 grand poorer.
I have a padlock on the shed door but have also kept them outside. If you think you will tire quickly of diving and won't get your money's worth, rent the buggers. Otherwise, if you are mad keen and will be mad keen for years to come, buy some. I can't see a problem with storing them outside in the back garden if they are well hidden and you don't have a fancy rich looking house.
I bet I get bloody burgled now.
OK my sums might be crap, but if you dive a lot, get some cylinders. Keep them outside if you need to.
Last edited by purple vonny; 04-02-2020 at 05:23 PM.