Aqua Lung BC 1 User Manual page 28

28
Deflation (Dump Valve)
Your BC comes equipped with a combination dump valve / over pressure relief
valve (OPRV). The primary function is to relieve excess air pressure inside the
bladder. If the internal pressure exceeds the spring pressure, the OPRV auto-
matically opens to release air, preventing damage to the BC. The dump valve
can also be opened manually by pulling on the pull knob and cord assembly to
quickly dump air from the BC. To close the dump valve, release the knob and
cord assembly.
To dump air as quickly as possible, always use the dump valve at the highest
point in the water column.
CAUTION:
valve (OPRV) is vital to prevent damage to the BC bladder.
Unauthorized service or tampering may render this valve
inoperable, and could cause the bladder to leak or burst.
This type of damage is not repairable, and is not covered
under warranty.
WARNING:
should 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.
The proper function of the over pressure relief
Most training agencies recommend that you
BC 1 User's Manual