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BD BUOYANCY COMPENSATOR USER'S MANUAL
Deflation Via the Universal Pull Dump / Over Pressure Relief Valve (OPRV)
Your BC comes equipped with three universal pull dumps / over pressure
relief valves (OPRV), one on the right shoulder, one on the lower rear right
and one on the lower rear left side of the BC. Their primary function is to
relieve excess air pressure inside the bladder. A knob and cord assembly is
attached to the dump valve; this can be pulled to manually release air from
the BC.
To dump air as quickly as possible, always use the dump valve at the highest
point in the water column. For example, either lower rear valve works best
while making a head-first descent, or swimming in a facedown position; the
right shoulder valve works best when in an upright position.
Universal pull Dump / oprV
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