Dive Regulator

Could I buy an octopus and use that instead of an expensive regulator?

I can get two octos for the price of one regulator!

Thanks,
Shane

Well Shane, there is a little difference between a 'safe 2nd' and a normal 2nd stage regulator. The 'octopus' usually has a longer hose.

However, most of the price difference that you are seeing is the fact that the first regulator includes the 1st and 2nd stage portions. The 'octopus' part of the regulator, a 2nd '2nd stage' as it were, is only half of what you need to breath with. You could buy two 'octopi' if you wanted to, but that would still leave you without the ability to breath underwater. You need the 1st stage too, and when you add that in you might as well get the normal set of 1st and 2nd stages, which are usually designed to work well together.

The first stage is the small, usually silver metal piece which connects directly to the valve of the tank. "The first stage of the regulator is usually designed to release the gas at a constant rate from the cylinder despite the pressure in the cylinder becoming less as the gas in the cylinder is used."

The second stage, with the mouthpiece attached, is at the end of a flexible hose. This is a demand valve, and allows you to take air from the tank only when you need to inhale. Otherwise the air would flow constantly and you'd have like 5 minutes underwater instead of 50 minutes or more.

For the whole explanation, see: http://en.wikipedia.org/wiki/Diving_regulator

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