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surrounding area occurs then this could cause your
regulator to leak, causing serious malfunction or even
personal injury. Care must be taken when securing
alternative sets of diffusers, do not apply excessive force as
damage may occur to the diffusers, exhaust valve or
surrounding area.
External Second Stage Adjustments
External adjustment features offer many advantages, including the
ability to adjust your second stage regulator’s sensitivity as your
diving conditions change. This can allow you to maintain peak
performance throughout every dive, or to desensitize your regulator’s
opening effort at times when you are not breathing from it.
Integrated Venturi System
Apeks second stages are equipped with a
unique Integrated Venturi
System (IVS) control switch
or Reversible Venturi
System (RVS) switch,
located on the opposite side
to the hose connection of
the second stage, that
controls the venturi assist to
reduce sensitivity to freeflow at
the surface and provide
maximum airflow at depth.
While diving set the switch to plus (+) to
achieve maximum venturi assistance for easier breathing.
To prevent the second stage from free-flowing, set the IVS/RVS to the
MIN(–) setting whenever the regulator is out of your mouth.
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