Pro LT BC Owner's Manual
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TABLE OF CONTENTS
Copyright Notice
Inflation Methods using a Powerline Inflator
Power Inflation Using a Powerline Inflator
Oral Inflation using a Powerline Inflator
Warnings, Cautions and Notes
Safety Information
Deflation Methods Using a Powerline Inflator
Deflation via Oral Inflator
Deflation via Powerline Dump Valve
Deflation via Dump Valve / Flat E-valve / Flat Valve
Dealer Inspection and Service
Annual Service and Inspection Record
Warranty Information
Limited Lifetime Warranty
Product Replacement on a Prorated Basis
Limitations
Special Features
Knife Grommets
Octo Pocket™
Double Cylinder Setup - Using After Market Twin Band Kits
Basic Setup
Attaching the MP Hose to the First Stage
Threading the Cylinder Band
Securing the Band to the Cylinder
Pre-Dive Inspection for BC's using Powerline Inflator
BC Inspection Checklist
Donning and Adjustment Procedures
Adjusting the Waistband Length - Hook and Loop System
Adjusting the Chest Strap
Post-Dive Care and Maintenance
Storage
Weight Integration Features
SureLock II™ Integrated Weight Release System
Maximum Weight Capacity
Loading Weight into the SureLock II™ Pouches
Installing the SureLock II™ Weight Pouches on your BC
Releasing SureLock II™ Weight Pouches
Non-releasable Weight
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COPYRIGHT NOTICE
This manual is copyrighted, all rights reserved. It may not, in whole or in part, be copied, photocopied,
reproduced, translated or reduced to any electronic medium or machine-readable form without prior
consent in writing from Aqua Lung. It may not be distributed through the internet or computer bulletin
board systems without prior consent in writing from Aqua Lung.
© 2012 Aqua Lung International BC Owner’s Manual
Aqua Lung is a registered trademark of Aqua Lung International
WARNINGS, CAUTIONS AND NOTES
Pay special attention to information provided in warnings, cautions and notes that are accompanied by
one of these symbols:
WARNINGS: Indicate a procedure or situation that may result in serious injury or death if
instructions are not followed correctly.
CAUTIONS: Indicate any situation or technique that will result in potential damage to the
product, or render the product unsafe if instructions are not followed correctly.
NOTES: Are used to emphasize important points, tips and reminders.
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SAFETY INFORMATION
General Precautions & Warnings
This manual provides essential instruction for the proper fitting, adjustment, inspection and care of your
new BC. Because Aqua Lung BC’s utilize patented technology, it is very important to take the time to
read these instructions in order to understand and fully enjoy the features that are unique to your specific
model. Improper use of this BC could result in serious injury or death.
Before using this buoyancy compensator (BC), you must receive instruction and certification in SCUBA
diving and buoyancy control from a recognized training agency. Use of SCUBA equipment by uncertified
or untrained persons is dangerous and can result in injury or death.
Read this owner’s manual completely before attempting to use your BC, and become familiar with it
first in a controlled environment such as a swimming pool, in order to weight yourself properly and to
become comfortable with using its many features and adjustments.
Before every dive, perform a complete pre-dive inspection according to the procedure prescribed in this
manual, to ensure that all components are functioning properly and no signs of damage or leaks are
present. If you find that your BC is not functioning properly or is damaged, remove it from service until
it can be repaired by an Authorized Aqua Lung Dealer or Distributor.
Your BC is not a lift bag. DO NOT use it to bring heavy objects to the surface. Doing so may cause
permanent damage to the BC, and could also result in serious injury or death due to embolism or
decompression sickness.
In an emergency such as an out of air situation or uncontrolled descent, it is important to remove and
jettison weight immediately. DO NOT depend solely on using your BC’s power inflator to lift you to the
surface.
In the event of an uncontrolled, rapid ascent, it is important to immediately begin venting air from the
BC. Continue venting air to slow your ascent rate if neutral buoyancy cannot be reestablished.
DO NOT inhale from your oral inflator. The BC may contain harmful contaminants or gases, which could
cause suffocation or injury.
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Factory prescribed service for this BC must be performed at least once annually by a factory trained
technician who is employed by an Authorized Aqua Lung Dealer or Distributor. Annual service consists
of a complete overhaul of the power inflator, and a general air leak inspection of the bladder and valve
connections.
Disassembly, repair, or lubrication must not be attempted by persons who are not factory trained and
authorized by Aqua Lung. Unauthorized service will render the warranty null and void.
This BC is designed for use with compressed air or Nitrox/EAN (enriched air nitrox) mixtures not
exceeding 40% oxygen. Any use of gas mixtures with increased oxygen content or the addition
of helium or other substances may cause corrosion, deterioration and/or premature aging of the
BC leading to component failure of the metal and rubber parts. The component failures could
lead to a loss of buoyancy control and/or pressure integrity of the BC resulting in injury or death.
Non-standard breathing mixtures may also present a risk of fire or explosion. The use of Nitrox/
EAN requires additional training. Failure to observe this warning may result in injury or death.
Use only nitrogen/oxygen mixtures containing no more than 40% oxygen.
CE Conformity - This BC conforms to EN 1809: 1997. It was controlled by the l’Institut National de Plongée
Professionnelle,organisme notifié n°0078, entrée n°3 port de la pointe rouge 13008 Marseille -France.
TEMPERATURE LIMITATIONS: This BC should be used in temperatures no lower than -4°F (-20°C)
and no higher than 150°F (65°C).
WARNING: This is NOT a life jacket: It does not guarantee a head up position of the
wearer at the surface. It is not designed to provide face-up flotation in all situations;
therefore it does not meet U.S. Coast Guard regulations for a life preserver or personal
flotation device (PFD). If you become unconscious in the water without a buddy present
to immediately give assistance, you may suffer serious injury or death from drowning.
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Your buoyancy compensator is primarily designed to help you maintain neutral buoyancy while in a
comfortably balanced, face-down swimming position underwater. It is also designed to provide you
with flotation so that you can rest on the surface, but it is not designed to function as a life preserver
or personal flotation device (PFD). In order to meet U.S. Coast Guard regulations, a PFD must be
designed so that it automatically rights you to a face-up position and holds your head out of the water
on the surface. The design characteristics of a personal flotation device are different from those of a
buoyancy compensator. The ability of any flotation device to float you in a face-up position can also
be affected by other diving equipment you wear, including a cylinder, weight or exposure suit, and
whether it can be inflated before you lose consciousness.
For this reason, it is important to always dive with and maintain close proximity to your buddy at all
times. Do not depend on any flotation device to hold your face above the surface in the event that you
are rendered unconscious in the water while diving.
If you have any questions regarding your Buoyancy Compensator or the information found in this
manual, please contact your regional Aqua Lung Dealer or Distributor. Distributor information is
available on the Aqua Lung website at: www.aqualung.com
WARNING: Although this manual provides some basic guidelines for certain buoyancy control
techniques, it is not a substitute for training from a professional diving instructor. Failure to weight
yourself properly may create a hazardous condition that could lead to serious injury or death. If
you are unsure how to weight yourself in order to achieve optimum buoyancy underwater and
on the surface, do not dive until you have obtained the necessary instruction from your diving
instructor or an Authorized Aqua Lung Dealer or Distributor.
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DEALER INSPECTION AND SERVICE
WARNING: DO NOT attempt to perform any disassembly or service of your BC. Service
requiring disassembly must only be performed by a factory-trained Aqua Lung technician.
To obtain service or repair, such as power inflator service or replacement of the bladder,
see your local Authorized Aqua Lung Dealer or Distributor.
1. It cannot be assumed that the BC is in good working order on the basis that it has received little use since
it was last serviced. Remember that prolonged or improper storage can still result in internal corrosion
and/or deterioration of o-ring seals and valve springs, as well as bladder seam degradation.
2. It is imperative that you obtain prescribed dealer service for your BC at least once a year from an
authorized dealer, including a general air leak inspection, visual inspection of the SureLock weight
pouch handles (if equipped) and complete overhaul of the power inflator and OPR valve. Your
BC may require this service more frequently, depending on the amount of use it receives and the
environmental conditions it is used in.
3. If the BC is used for rental or training purposes in salt, chlorinated, or silted fresh water, it will require
prescribed dealer service every three to six months. Use in chlorinated water will greatly accelerate
the deterioration of most components, and require more frequent service.
4. DO NOT attempt to perform any disassembly or overhaul service of your BC. Doing so may cause
the BC to dangerously malfunction, and will render the warranty null and void. All service must be
performed by an Authorized Aqua Lung Dealer or Distributor.
NOTE: It is important to obtain prescribed dealer service for your BC at least once annually,
from an Authorized Aqua Lung Dealer or Distributor, your personal safety and the mechanical
integrity of your BC depends on it.
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ANNUAL SERVICE AND INSPECTION RECORD
Purchase Date:
Store Name:
Country:
BC Model:
Serial Number:
DATE
DEALER NAME
CITY, STATE
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WARRANTY INFORMATION
All warranty transactions must be accompanied by proof of original purchase from an Authorized Aqua
Lung Dealer or Distributor. Be sure to save your sales receipt, and present it whenever returning your BC
for warranty service.
LIMITED LIFETIME WARRANTY
Warranty coverage on buoyancy compensators covers the product throughout its useful life, subject to
the conditions listed below and utilizes a pro-rated replacement policy*.
Aqua Lung warrants to the original purchaser for the useful life of the product, from the date of purchase,
that the product will be free from defects in materials and workmanship, provided that it receives normal
use, proper care and prescribed dealer service subject to the limitations listed below. The Limited Lifetime
Warranty is extended only to the original purchaser for purchases made from an Authorized Aqua Lung
Dealer or Distributor and is not transferable. This warranty is limited to repair or replacement only at the
discretion of Aqua Lung.
* PRODUCT REPLACEMENT ON A PRORATED BASIS
Products under the Limited Lifetime Warranty that malfunction due to material or manufacturer defects
that have also had a significant amount of use will be replaced on a prorated basis. Prorating will be
determined by a percentage factor based on the condition of the product and how long the product
was used prior to the warranty claim. This can be useful to evaluate Limited Lifetime Warranty claims
since the warranty period is for the “useful life of the product” and not a set length of time. The following
guidelines should be used in determining what prorated percentage will be used.
NOTE: This can be a subjective evaluation. Fair and reasonable judgment should be used.
Prorated Values of Products Sold at Retail
Aqua Lung Pays
Customer Pays
Like new and less than 2 years old
100%
0%
Slightly used and less than 5 years old
75%
25%
Very used and /or more than 5 years old
50%
50%
Worn out
0%
100%
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WARRANTY LIMITATIONS
Warranty coverage does not extend to damages caused by improper use, improper maintenance,
neglect, unauthorized repairs, modifications, accidents, fire, casualty or normal wear and aging.
Cosmetic damage(s), such as scratches, nicks and fraying are not covered under warranty except
when the product is new, out of the original packaging.
This warranty does not extend to equipment used for rental, commercial or military purposes.
This warranty gives you specific legal rights. You may have rights which vary from state to state and
country to country.
AQUA LUNG DISCLAIMS AND EXCLUDES ANY LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES. SOME STATES IN THE U.S. AND CERTAIN FOREIGN COUNTRIES DO NOT ALLOW
EXCLUSIONS OR LIMITATIONS OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES,
SO THIS MAY NOT APPLY TO YOU.
WARNING: It is dangerous for untrained and uncertified persons to use the equipment
covered by this warranty. Therefore, use of this equipment by an untrained person
renders any and all warranties null and void. Use of SCUBA equipment by anyone who
is not a trained and certified diver, or receiving training under the supervision of an
instructor, could lead to serious injury or death.
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BASIC SETUP
Aqua Lung recommends that you bring your buoyancy compensator, together with your regulator, to
your authorized dealer for the installation of the MP inflator hose and other accessories. The retailer can
also answer any questions you may have pertaining to the information in this manual.
NOTE: The terms “hook”, “loop” and “hook & loop” are used throughout this manual. Hook &
Loop is commonly known as Velcro®, which is a trademarked brand of hook & loop. Many of
the BC’s components have hook & loop attachments, including the waistband, cylinder bands,
weight pouch flaps and inflator hold down.
If it is not possible to return the BC with your regulator to your authorized dealer, you may install the MP
quick disconnect inflator hose by carefully performing the steps in the following procedure. Please note
that the procedure varies based on the presence or absence of the i3 Control Unit.
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ATTACHING THE MP HOSE TO THE FIRST STAGE
1. Remove the inflator hose
from the power inflator body by
gripping the grooved sleeve over
the quick disconnect coupling
with your thumb and forefinger.
Slide the sleeve back.
2. Remove the port plug from an MP port on the regulator using
an appropriately sized wrench.
WARNING: DO NOT connect the inflator hose to a
high pressure (HP) port (greater than 200 psi / 14 bar).
This may cause the hose to burst when pressurized,
which can result in serious injury. If you are unsure
which regulator port is medium pressure (MP) or
high pressure (HP), consult your regulator owner’s
manual or your dealer before attaching the hose.
3. Check to ensure the o-ring is present and in good condition.
Screw the threaded end of the hose into the port and tighten to
40 in-lbs (4.5 Nm) with a 9/16” wrench.
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THREADING THE CYLINDER BAND
Your BC ships from the factory with the cylinder band already threaded, but in the event it becomes
unthreaded, please follow the directions below:
1. Firmly grasp the metal D-ring with your
left hand.
2. While firmly holding the metal D-ring,
rotate the back towards the webbing. The
buckle should form an angle with the metal
D-ring as shown in the top view.
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3. Insert band through the metal D-ring, then
through the middle slot.
4. Insert band through the inside slot.
5. Insert band through the outer slot.
NOTE: This final threading step is done
when the BC is secured to the cylinder (refer
to step 4 in section: Securing the Band to
the Cylinder). Close the buckle half way to
prevent the webbing from slipping and thread
the free end of the band through the open
slot in the end of the buckle.
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SECURING THE BAND TO THE CYLINDER
NOTE: BC cylinder bands adjust for all standard cylinder diameters: 6.9 in (17.5 cm), 7.25
in (18.5 cm), and 8.0 in (20.3 cm). The cylinder bands are properly threaded to the buckles
when the BC leaves the factory. If rethreading is necessary, follow the procedure in the section:
Threading the Cylinder Band.
WARNING: The cylinder band will initially stretch as it becomes wet. Always wet the band
before making the final adjustment; apply enough tension to ensure that the cylinder is
completely secure. Test this connection before every dive. If the cylinder slips free from
the BC during the dive, you may loose your air supply, which could lead to serious injury
or death.
NOTE: Your BC may come equipped with a tank positioning strap. This strap allows you to place
the BC in the proper position for perfect tank placement. Place the tank positioning strap over the
cylinder valve and adjust as needed.
1. Remove the free end of the cylinder band from
the outer slot on the buckle.
2. Wet the cylinder band and then slide it over the cylinder so that the BC is at the desired position in
relation to the cylinder valve. Make sure the cylinder valve air outlet is facing the back of the BC.
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3. While holding the cylinder secure, pull the free
end of the cylinder band until there is a very tight fit
between the pack and the cylinder
4. Close the buckle half way to hold the cylinder band
taut, and thread the free end of the band through the
open slot in the end of they buckle.
5. Pull the cam buckle closed so tat it lies flat against the cylinder. Secure the end of the cylinder band
with the hook & loop attachment.
6. Test the tightness by pushing/pulling the back frame and cradle.
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DONNING AND ADJUSTMENT PROCEDURES
1. Remove the weight pouches from the BC, if applicable.
2. Disconnect the waist buckle and waistband.
3. Ensure that the quick release buckles (if equipped) on both torso straps are securely fastened.
While firmly holding the torso strap where it connects to the BC lobe, fully extend each torso strap
to its maximum length by pushing straight up on the slide buckle.
4. While your dive buddy lifts and holds the BC/cylinder behind you, place your arms through the BC
torso straps as if you were putting on a jacket.
5. While your dive buddy lifts and holds the BC/cylinder behind you, place your arms through the BC
torso straps as if you were putting on a jacket.
6. Connect the chest strap buckle. Pull on the free end of the strap to tighten. The chest strap should
feel comfortable across the chest; it should not be overtightened so that it feels restrictive.
7. After your buddy has released the cylinder and the BC feels comfortably supported on your hips and
shoulders, bend forward at the waist and adjust the torso straps to a comfortable length by pulling
on the torso strap D-rings (if equipped).
NOTE: Adjusting the shoulder straps too tightly will transfer the cylinder weight from the hips
to the shoulders, restricting your arm movement and decreasing comfort.
8. If necessary, readjust the waistband and waist buckle so that they are comfortably snug, but not
restricting.
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ADJUSTING THE WAISTBAND LENGTH - HOOK AND LOOP SYSTEM
Lay your BC so that the front of the BC is facing you. Disconnect the waistband buckle, the waistband, and shoulder straps so you have open access to the back pad.
1. There is a retaining flap located on the bottom
backside of the back pad. Disconnect the flap and
lift up the back pad to expose the waistband.
2. For each side of the waistband, detach the
hook & loop and adjust to the desired position,
then re-secure the hook & loop. The hook and
loop must overlap a minimum of four inches, but
not extend past the end of the loop.
3. Re-secure the back pad and try on the BC to make sure the waistband length is correct. Repeat
this procedure until the proper length is achieved.
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ADJUSTING THE CHEST STRAP
The chest strap fits across your sternum and keeps the two shoulders from slipping to the sides,
ensuring a comfortable and secure fit. Before donning the BC, loosen and disconnect the chest
strap. After donning the BC, connect the chest strap and tighten by pulling on the free ends of the
straps. The chest strap should feel comfortable across the chest; it should not be overtightened
so that it feels restrictive. Once the shoulder straps are in position, adjust the shoulder strap
length by pulling down on the adjustment D-rings until the BC fits comfortably. Some BC models
also offer vertical adjustment of the chest strap. Become familiar with the adjustment method on
your particular model so that you can perform this adjustment in the water if necessary.
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WEIGHT INTEGRATION FEATURES
SureLock II™ Integrated Weight Release System
Your BC features the SureLock II Integrated Weight System. With the SureLock II system, weight
pouches are secured with a mechanical locking mechanism. The SureLock II weight system either
supplements or replaces a conventional weight belt. This unique feature allows you to quickly jettison
either one or both weight pouches in the event of an emergency, thereby maintaining better control
over your rate of ascent. The weight pouches can be easily reloaded into the BC pockets while you are
wearing the BC.
NOTE: It is very important to read the following instructions, and become thoroughly familiar
with the correct methods for installing and releasing weight before you dive with your BC.
Maximum Weight Capacity
The SureLock II weight system features two interchangeable weight pouches which can be filled with either
block weights or “soft weight” (pouches containing lead shot), in increments of 5 pounds or less. For ease
of operation, low-profile block weight is strongly recommended. Refer to the BC Weight Capacity Chart for
your specific model of BC for maximum weight pouch capacity.
WARNING: For smaller BC’s, the lift capacity may not exceed the weight pouch carry capacity. The negative
buoyancy of the lead, plus the negative buoyancy of the cylinder (when full), should not exceed the BC’s
positive buoyancy. The inability to achieve positive buoyancy while at depth or on the surface may lead to
a hazardous situation that could lead to serious injury or death. Refer to the model-specific label, usually
found in the pocket of your BC, to find the designated lift capacity, and load weight pouches accordingly
(see photo above).
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WEIGHT INTEGRATION FEATURES
Loading Weight into the SureLock II™ Weight Pouches
NOTE: Your BC may not be able to float by itself on the surface if your BC is loaded with
weight at or near its maximum buoyancy. In water weight of cylinders and other equipment
may contribute to negative buoyancy of your full set of SCUBA equipment.
Pro LT BC Weight Capacity Chart
Pro LT
BC Size
Trim Weight
Relesable Weight
Weight Pocket Type
XS
10 lb/4.5 kg
20 lb/9 kg
10 lb (4.5 kg) X 2
S
10 lb/4.5 kg
20 lb/9 kg
10 lb (4.5 kg) X 2
M
10 lb/4.5 kg
20 b/9 kg
10 lb (4.5 kg) X 2
ML
10 lb/4.5 kg
20 lb/9 kg
10 lb (4.5 kg) X 2
L
10 lb/4.5 kg
32 lb/14.5 kg
16 lb (7.3 kg) X 2
XL
10 lb/4.5 kg
32 lb/14.5 kg
16 lb (7.3 kg) X 2
WARNING: The non-releasable weight pockets are intended strictly for containing nonreleasable weight, used in addition to releasable weight. Do not fill either pocket with
weight unless you are certain you can achieve positive buoyancy at depth by releasing
your weight pouches or weight belt while your BC is completely deflated.
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WEIGHT INTEGRATION FEATURES
Loading Weight into the SureLock II™ Weight Pouches
Aqua Lung recommends that each pouch is loaded with equal amounts of weight for optimum balance,
preventing the tendency to roll to one side during the dive. Also, it is strongly recommended that each
weight pouch is fully loaded with two separate weight blocks for the 10 lb pouch (load horizontally),
three separate weight blocks for the 15 lb pouch (load vertically) or four separate weight blocks for the
16 lb pouch (load horizontally). For example, if you want to load a 10 lb pouch with 10 pounds, use two
separate 5 pound blocks, if you want to load a 15 lb weight pouch with 15 pounds, use three separate
5 pound blocks, if you want to load a 16 lb pouch with 16 pounds, use four separate 4 pound blocks.
Loading Weight into the 10 lb SureLock II™ Weight Pouches
Lift up each pouch’s flap (a), and lay it back over the
handle (b). While holding the pouch fully open, insert
the weight (horizontally) and then close the flap. When
each pouch has been loaded with weight, firmly run
your hand over the flaps to securely fasten the hook &
loop (c).
Loading Weight into the 15 lb SureLock II™ Weight Pouches
Lift up each pouch’s flap (a), and lay it back over the
handle (b). While holding the pouch fully open, insert
the weight (vertically) and then close the flap. When
each pouch has been loaded with weight, firmly run
your hand over the flaps to securely fasten the hook &
loop (c).
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Loading Weight into the 16 lb SureLock II™ Weight Pouches
The procedure for loading the 16 lb weight pouch is the
same as the 10 lb weight pouch, except that the 16 lb
weight pouch has an upper and lower weight compartment. Aqua Lung recommends that the pouches be
completely filled with four separate weight blocks (two
per compartment); however, if you need to partially fill
the pouch, load the bottom compartment first. Use the
diagram for proper weight placement. (This diagram
is also sewn on the weight pouch flap).
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Loading Soft Weight into the SureLock II™ Weight Pouches
Aqua Lung recommends block weights be used in the
SureLock II weight pouch for the best fit and ease of
insertion. Soft weights may be used, but it is critical
that the weights be loaded and secured correctly. The
procedure for loading soft weights is the same as block
weights, but it is important to ensure the soft weights
are completely fitted into the weight pouch. This will
ensure that the SureLock II locking mechanism can
properly engage.
NOTE: Some weight pouches are specially pre-formed to fit the contour of your waist. Do not
attempt to bend or straighten a pre-formed pouch.
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INSTALLING THE SURELOCK II™ WEIGHT POUCHES ON YOUR BC
CAUTION: Aqua Lung strongly recommends that you do not attempt to don your BC
when it is fully loaded with weight. You may otherwise risk injury due to muscle strain or
a temporary loss of balance.
The SureLock II pouches are installed with the plastic panel facing outward (pouch flap facing toward the
BC). To install either pouch, grasp the Lobe Retaining D-ring (if equipped) with your opposite hand and
slide the closed end of the pouch into the opening of the holster. Insert the male portion of the SureLock
II buckle (a) into the female receptacle (b) on the BC until you can hear/feel it click into place.
WARNING: Before every dive, it is important
to make sure each weight pouch is secure, in
order to prevent the pouches from falling out.
Involuntary release of both weight pouches
underwater can cause a sudden increase in
buoyancy causing a rapid ascent, which could
lead to serious injury or death due to arterial
gas embolism, decompression sickness or
drowning.
WARNING: Ensure the soft weight is inserted
all the way into the SureLock II pouch. If any
excess of the soft weight is protruding out
of the weight pouch, it can prevent the SureLock II pouch from being properly secured.
Involuntary release of both weight pouches
underwater can cause a sudden increase
in buoyancy causing a rapid ascent, which
could lead to serious injury or death due to
arterial gas embolism, decompression sickness, or drowning.
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RELEASING SURELOCK II™ WEIGHT POUCHES
Unlike a weight belt, which has only one release mechanism, each weight pouch is connected to the BC
independently of the other and must be released separately. This provides you with the option of being able
to jettison one pouch at a time, thereby maintaining better control of your ascent rate in an emergency.
In the event that you need to jettison weight, simply pull the release handle of each pouch towards the
center of the waist buckle. When the pouch is completely disengaged from its holster, hold it out and
away from your body before dropping it.
WARNING: Ensure that your weight pouches
are not obstructed by any straps, lines, etc.
DO NOT add weight to the BC’s pockets, as
this may interfere with the removal of the
pouches in an emergency. Failure to ditch
weight in an emergency may lead to serious
injury or death due to drowning.
WARNING: To avoid injuring other divers, always look below you before dropping weight.
NOTE: In addition to becoming familiar with the weight system yourself, it is very important to
explain its function to your dive buddy so that he/she is equally familiar with it.
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NON-RELEASABLE WEIGHT
To supplement the releasable weight, some BC’s are designed to carry non-releasable weight in two fixed
pocket locations (Zuma trim pockets are sold separately and may be added onto the cylinder band).
To install weight into the non-releasable weight pockets, simply disconnect the flap buckle, slide in the
weight block, fold the flap over the pocket, and reconnect the buckle. Weight should be added to the
non-release (trim) pockets after the BC has been secured to the cylinder.
The non-releasable weight pockets are designed to hold single rectangular weight blocks. To avoid
accidental loss of weight, Aqua Lung strongly advises against using small bullet-shaped weights and
shot weight.
Refer to the Weight Capacity Charts for maximum non-releasable (trim) weight capacity.
Because the weight is non-releasable, it must not be used as your primary source of ballast. After
filling the fixed pockets with weight, it is extremely important to check your buoyancy in the water
while wearing the BC attached to a fully charged cylinder and your exposure suit. While standing in
chest deep water, deflate the BC completely and check to ensure that you can easily achieve positive
buoyancy by jettisoning your releasable weight.
WARNING: The non-releasable weight pockets are intended strictly for containing nonreleasable weight, used in addition to releasable weight. Do not fill either pocket with
weight unless you are certain you can achieve positive buoyancy at depth by releasing
your weight pouches or weight belt while your BC is completely deflated.
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INFLATION METHODS USING THE POWERLINE INFLATOR
Your BC has been fitted with a Powerline Inflator. This section covers inflation using this system.
Power Inflation using a Powerline Inflator
For the power inflator to operate, the MP inflator hose must be connected.
To connect the MP hose, grip the grooved sleeve at the connection fitting
with your thumb and forefinger, and slide the sleeve back. Place the fitting
over the quick disconnect plug (c), and firmly push inward while releasing
the sleeve. Check to ensure that the hose is securely attached. After the
hose is attached to the power inflator, pressurize the first stage regulator by
slowly opening the cylinder valve.
To inflate your BC with low pressure air, depress the power inflator button
(d). Do not hold the inflator button depressed continuously underwater, as
this could cause you to become excessively buoyant. Instead, depress the
button in short bursts until you become neutrally buoyant.
WARNING: Do not rely on the power inflator as the only
means to inflate your BC. It is important to practice the
technique for orally inflating your BC so that you are prepared for any type of malfunction or out of air situation
that could render the power inflator inoperable. You may
otherwise be unable to achieve positive buoyancy in an
emergency, which could lead to serious injury or death.
Oral Inflation using a Powerline Inflator
To orally inflate your BC, place your lips on the oral inflator mouthpiece
(a) and exhale a small amount of air into the mouthpiece to purge any
water that may still be in the housing. While continuing to exhale into
the mouthpiece, depress the oral inflator button (b) to inflate the BC.
Immediately after exhaling, release the oral inflator button to prevent
air from escaping.
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DEFLATION METHODS FOR BC’S WITH A POWERLINE INFLATOR
Throughout the course of a dive, it will be necessary to release air from the BC using one of the three
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, headfirst, 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 Powerline inflator
body to its highest possible position (above the head). Press the oral
inflator button (a) to start venting air. This method is most effective
on the surface when starting the initial descent.
Deflation Via Powerline Dump Valve
Inside the power inflator’s corrugated hose is a cable that attaches the power inflator to the Powerline
Dump Valve at the top of the airway assembly. You can vent air from the BC by firmly pulling straight
down on the power inflator. This dump valve provides an effective and convenient way to vent air from
the BC while in either an upright or facedown swimming position.
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DEFLATION VIA DUMP VALVE / FLAT E-VALVE / FLAT VALVE
BC’s have either one, two or three additional Dump Valves / Flat E-Valves / Flat Valves, depending on
the specific BC model. Their primary function is to relieve excess air pressure inside the bladder, but
some may be equipped with a knob and cord assembly and can be opened manually by pulling on the
knob and cord assembly to quickly dump air.
To dump air as quickly as possible, always use the dump valve / Flat E-Valve / Flat valve at the highest
point in the water column. For example, the lower rear valve works best while making a headfirst descent,
or swimming in a facedown position; the right shoulder valve works best when in an upright position.
Dump Valve
Flat E-Valve
© 2012 Aqua Lung International
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SPECIAL FEATURES - Knife Grommets
Your BC has two grommet holes designed to accept
many of the specialty BC knives available from Aqua
Lung. For information on available knife models, consult
an Authorized Aqua Lung Dealer or Distributor. To attach
or remove the knife and sheath from the BC, refer to the
instructions provided with the knife.
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SPECIAL FEATURES - Octo Pocket™
Your BC features an Octo Pocket located on the inside of one or both of the BC lobes which allows you to
easily place your octopus (alternate air source) in a highly visible, easy to access location. Fold the hose
back on itself and insert downward into the pocket.
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SPECIAL FEATURES - Double Cylinder Setup - Using After-Market Twin Band Kits
Aqua Lung does not offer a twin cylinder kit for your BC. If you want to adapt twin cylinders to your BC,
you must consult with your professional dive retailer about after-market twin band kits that would work
with your specific model.
Before adapting your BC for use with double cylinders, it is important to compare the lift capacity of your
particular BC size and model with the buoyancy specifications of the cylinders, the amount of weight
you will carry, and the type of exposure suit you will wear.
Your BC backpack may also have certain weight limitations depending on the size and model, as
double cylinders vary in both size and weight. To ensure your safety, refer to the tag located on the
inside BC pocket prior to attaching double cylinders to confirm the approved double cylinders for your
particular backpack.
WARNING: When fully charged and worn together as doubles, some cylinders may create
enough negative buoyancy to counteract the amount of lift your BC can provide. At depth,
this can lead to a dangerous situation if your wetsuit becomes compressed and you can no
longer achieve positive buoyancy by jettisoning weight. The excess weight of some double
cylinders may also lead to structural failure of the backpack. Such an event while diving
may separate you from your primary air source, and could lead to serious injury or death.
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PRE-DIVE INSPECTION FOR BC’S USING POWERLINE INFLATOR
Before each use, the BC must be given a thorough visual inspection and functional test. NEVER dive
with a BC that shows signs of damage to its bladder or valves until it has received a complete inspection
and service from an Authorized Aqua Lung Dealer or Distributor.
BC INSPECTION CHECKLIST
1. Connect the power inflator to a source of clean, compressed air via the MP quick disconnect hose.
Depress and release the inflator button intermittently to ensure that the airflow is unobstructed, and
that the airflow stops completely when the button is released.
2. Manually operate the overpressure relief (OPR) valve by pulling on the attached knob and cord to
release air from inside the BC, and then fully inflate the BC until the OPR valve opens. Examine the
operation of the OPR valve by repeatedly inflating the BC to ensure that it opens to relieve excess
pressure, yet closes immediately afterward to allow the bladder to remain taut and fully inflated.
3. Check the function of the oral inflator button and Powerline dump valve, to ensure a rapid and
unobstructed exhaust from each valve. Fully inflate the BC once again, and disconnect the power
inflator from the compressed air supply and listen closely for any leaks.
WARNING: If you can hear any leaks, or if the bladder begins to deflate within 5-10 minutes, DO
NOT attempt to use the BC until it has received service from an Authorized Aqua Lung Dealer
or Distributor.
4. Make a final check of the cylinder band’s tension to ensure that it has not loosened due to stretching.
Retighten if necessary.
5. Before entering the water, check both weight pouches, if applicable, to ensure that they are correctly
fastened to the BC.
WARNING: Loss of the releasable weight pouches can occur if they are not properly
secured. Involuntary release of both weight pouches can cause a sudden increase
in buoyancy causing a rapid ascent, and could lead to serious injury or death due to
arterial gas embolism, decompression sickness, or drowning.
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POST-DIVE CARE AND MAINTENANCE
With proper care, your BC will provide many years of reliable service. The following preventive maintenance
must be performed to extend the life of your BC:
1. Avoid prolonged exposure to direct sunlight and extreme heat. Nylon fabric can quickly fade when
exposed to the sun’s ultraviolet rays, and extreme heat may damage the welded bladder seams.
2. Avoid repeated or prolonged use in heavily chlorinated water, which can cause the BC fabric to discolor
and decay prematurely.
3. Do not allow the BC to chafe against any sharp objects or rough surfaces that could abrade or
puncture the bladder. Do not set or drop heavy objects such as block weights on the BC.
4. Avoid any contact with oil, gasoline, aerosols, or chemical solvents.
5. To preserve the life of the bladder, rinse it inside and out with fresh water after every day of use, using
the following procedure:
a) Pressurize the power inflator with MP air via the MP hose.
b) Using a garden hose, direct water through the oral inflator mouthpiece or the Multiport to flush
the interior of the bladder, and then thoroughly rinse the exterior of the BC.
c) Completely drain the bladder of water, either through the oral inflator or through the Multiport.
CAUTION: Before rinsing, ensure that the inflator is pressurized with air. This will
prevent debris and contaminants from entering the valve mechanism if the inflator
button is accidentally depressed.
STORAGE
After rinsing, inflate the BC, and allow it to dry inside and out. Store the BC partially inflated, away from
direct sunlight and in a clean, dry area. Do not store the BC in an enclosed space, such as a car trunk,
where temperatures may fall below 0ºF (-18ºC) or rise above 120ºF (49ºC).
© 2012 Aqua Lung International
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