Aqua Lung WTX Buoyancy System - Manual (Page 38)

DEFLATION METHODS
Throughout the course of a dive, it will be necessary to release air from the BC using one of the
two methods described in the following instructions. Each method uses a valve that is in a different
location. The method you choose at any time may depend on whether you are making your initial
descent feet-first, head-first, or maintaining neutral buoyancy underwater. Always remember to utilize
the valve that is at the highest point on the bladder, depending on your position in the water.
DEFLATION VIA ORAL INFLATOR
To deflate the BC using the oral inflator, lift the inflator body to its highest possible position (above the
head). Press the oral inflator button (Fig. 1b, previous page) to start venting air. This method is most
effective on the surface when starting the initial descent.
DEFLATION VIA OVER-PRESSURE RELIEF (OPR) /
DUMP VALVE
Each buoyancy cell is equipped with an over-pressure
relief (OPR) / dump valve. Their primary function is to
relieve excess pressure inside the cell but they can
also be opened manually by pulling on the ball and
cord assembly.
Some of the buoyancy cells offer an alternate location
where an optional dump valve may be added. This
alternate location comes capped from the factory. A
universal OPR/dump valve kit may be ordered from
your dealer (p/n 42754). Instructions for installation
are included in the kit.
To dump air as quickly as possible, always use
the dump valve at the highest point in the water
column. For example, the lower valve works best
while making a head-first descent, or swimming in
a face-down position.
© 2014 Apeks
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