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Scuba octopus? What is the difference between a regulator and an octaopus. What exactly is an octopus

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An octo IS a regulator. There are two types or regulators on a typical scuba rig. Your first stage reg that is attached to your tank valve. From this first stage, there are hoses leading to your primary breathing second stage reg and your Octo second stage. The job of the first stage is to bring that possibly 3,000 psi air in the tank, down to a more reasonable pressure of about 150 psi. From there, the air goes to the second stages and can be reduced down further by these second stage, on demand (meaning it delivers air when you inhale and stops when you finnish inhaling), regs. The Octo is a second stage back up for a buddy that is out of air or if your own primary second stage ( the one you normally breathe from) is no longer functioning. Octos are generally ( not always) a cheaper reg, that may not have all the bells and whistles that a primary air source does. It's there for an emergency, so ease of breathing under load and tuning adjustments are minor. It gives you air when you're in a pinch, thats the important thing.

Posted on Dec 01, 2008

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Safe second?


"The second stage regulator takes the manageable pressure coming from the 1st stage through the hose and delivers it to your mouthpiece in a way that is comfortable to breathe. Where the 1st stage is only concerned with letting air flow into the hose the 2nd stage has more complex machinery which handles both inhaling and exhaling through the same mouthpiece. Like the first stage the 2nd stage scuba regulator uses a diaphragm or piston to open a valve. Breathing in from the mouthpiece reduces the air pressure inside the chamber, water pressure pushes the diaphragm in, which opens the intake valve. When you stop inhaling the pressure in the chamber balances and the valve closes. The result is an air delivery system which supplies air only when you are inhaling and does not leak air constantly through the mouthpiece. A well balanced and well-maintained scuba regulator does its job so well that breathing feels natural and effortless despite the all mechanics involved. The second stage scuba regulator also has a purge or exhaust valve, which lets your exhaled air out of the chamber, but doesn't let water in. When you exhale into the second stage scuba regulator the pressure inside the chamber becomes greater than the ambient pressure. The exhaust valve is a simple one-way valve which lets this air escape. The second stage scuba regulator also has a purge or exhaust valve, which lets your exhaled air out of the chamber, but doesn't let water in. When you exhale into the second stage scuba regulator the pressure inside the chamber becomes greater than the ambient pressure. The exhaust valve is a simple one-way valve which lets this air escape. A second stage scuba regulator also has an ""emergency"" or ""purge"" button which forces the intake valve to open. When the purge button is pressed air will flow continuously into the chamber and escape either through the mouthpiece or the aforementioned exhaust valve"

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