Free Flows and Cold Water Diving
and air temperatures are reducing so the risk of frozen regulator free flow is
that water colder than 10 degrees can cause regulator icing.
an EN 250 cold water rated regulator in water with a temperature of less than 10 degrees. New regulators that are unsuitable for cold water are marked like this:- > 10 °C on either the first stage or the second stage, older regulators may not be marked like this. If you have any doubts about the suitability of your regulator for cold water use contact the manufacturer.
your regulator out of the cold prior to diving.
gently during the dive
your regulator dry between dives.
breathing during an underwater free flow
Water Diving Don'ts
your regulator in the car overnight
heavily through your regulator in air prior to diving
an SMB or lift bag from your alternate air source
unnecessary deco diving
deeper than you have to