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Regulator Owner’s Manual
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It is possible for icing or freeze-up to occur, even with a regulator that
has been specially designed for cold water use. It is therefore imperative
to practice the correct cold water diving procedures, and take special
precautions to prevent second stage icing. This training must include
procedures for dealing with regulator freeze-up, unexpected freeflow, and
emergency out-of-air situations. These procedures are taught in cold water
training programs provided by most recognised certification agencies.
The following measures will further reduce the risk of freeze-up:
1. Request verification from your dive store that the air in your cylinder(s)
is dry. It should have a dew point below -54ºC or -82ºF. Excess water
vapor can freeze, causing a freeflow condition, or blocking the flow of
air entirely.
2. Protect your regulator from any contact with water until the moment
that you are ready to begin your dive.
3. Protect your equipment from cold temperatures before the dive. Keep
your regulator and all its accessories in a warm, dry place.
4. Avoid breathing through the regulator or pressing the purge button in
very cold air before entering the water.
5. Avoid removing the regulator from your mouth during the dive. This will
prevent cold water from entering the regulator’s second stage.
6. As far as is possible, avoid heavy exertion during the dive in order to
minimise the volume of air flowing through the regulator. Ensure the
IVS/RVS lever (if fitted) is set to plus (+) position while diving. Avoid
discharges of air on the surface. Do not continually press the purge
button.
7. Do not practice buddy breathing etc. Keep your regulator in your
mouth . In an emergency offer or take a spare regulator.
WARNING: SCUBA regulators and equipment have operational
limits when used in water colder than 10°C (50°F). If you attempt
to dive in cold water without first obtaining the necessary training
and preparation of your equipment, you risk serious injury or
death.
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