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Overpressure Relief (OPR) via Flat E-Valve
In addition to the Flat E-Valve on the right
shoulder, the Pro QDi3 has a second Flat
E-Valve on the back lower left of the BC.
Both Flat E-Valves function as overpressure relief valves to
relieve excess pressure inside the bladder.
NOTE: One-way valves are included in Flat E-Valve
Technology. This allows air to escape the BC yet does
not allow water to enter while venting.
CAUTION: The proper function of the overpressure relief valve is
vital to prevent damage to the BC bladder. Unauthorized service or
tampering may render these valves inoperable, and could cause the
bladder to leak or burst. This type of damage is not repairable, and
is not covered under warranty.
WARNING: Most training agencies recommend that you descend
in an upright, feet-first position, in order to maintain a slower and
more controlled descent. This is especially true if you experience
difficulty equalizing your ears, or if you are descending in low
visibility conditions.
Pro QDi3 BC Owner's Manual
Lower E-Valve
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