| 1. | The demand valve was a revolutionary new piece of equipment.
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| 2. | The Universal used the same demand valve and was modular in design.
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| 3. | In both systems, each diver carries two demand valves.
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| 4. | Examples include an auxiliary demand valve, a pony bottle and bailout bottle.
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| 5. | Demand valve resuscitators were introduced with restrictors to limit flow rates to 40 lpm.
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| 6. | The ADV is virtually identical in construction and function to the open circuit demand valve.
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| 7. | They consist of a first-stage regulator, and a second-stage demand valve.
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| 8. | The associated demand valve comprising the bail-out valve is always a single hose regulator.
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| 9. | Breathing gas is supplied through a mouth-held demand valve or light full-face mask.
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| 10. | The secondary demand valve can be a hybrid of a demand valve and a buoyancy compensator inflation valve.
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