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  1. #1
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    Question redirect of exhaled air

    sorry for my english,
    I have a question:
    does it exist something which redirects exhaled from mouth air into another part of
    snorkel - not to the snorkel tube by which oxygened air is inhaled?
    In a decathlon shop was told me that in those masks:
    https://www.decathlon.co.uk/C-2455105-easybreath-masks
    that can be achived because this mask have valve which prevent air to get away
    by the same way by which it was inhaled (so it has "in" and "out" tube)
    - but I think this valves are not sufficient -
    I tried to use it but it was also possible to breath with clogged holes which should
    only be used for incomming air (air was also getting in by "outgoing" tube).
    Maybe in "diving" world exists something which has this feature and is not too expensive?
    I was thinking to make it by my own with check valve and this mask - did someone try to do
    this or it is possible to make it? This face mask + something like check valve is convient
    because it do not "disturbs work" and it is possible to talk during usage but any other
    existing solution also will be welcome.
    thanks for help in this corona times

    br,
    watt-rs

  2. #2
    Established TDF Member Energy58's Avatar
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    Quote Originally Posted by watt-rs View Post
    sorry for my english,
    I have a question:
    does it exist something which redirects exhaled from mouth air into another part of
    snorkel - not to the snorkel tube by which oxygened air is inhaled?
    In a decathlon shop was told me that in those masks:
    https://www.decathlon.co.uk/C-2455105-easybreath-masks
    that can be achived because this mask have valve which prevent air to get away
    by the same way by which it was inhaled (so it has "in" and "out" tube)
    - but I think this valves are not sufficient -
    I tried to use it but it was also possible to breath with clogged holes which should
    only be used for incomming air (air was also getting in by "outgoing" tube).
    Maybe in "diving" world exists something which has this feature and is not too expensive?
    I was thinking to make it by my own with check valve and this mask - did someone try to do
    this or it is possible to make it? This face mask + something like check valve is convient
    because it do not "disturbs work" and it is possible to talk during usage but any other
    existing solution also will be welcome.
    thanks for help in this corona times

    br,
    watt-rs
    You need a twin hose regulator - look for Aqualung Mistral - which were made up to the early 2010s and can be found on ebay sometimes - they have a first stage and second stage together behind the diver. They are no longer made but you can get them serviced. They are very expensive - around £600 typically

  3. #3
    Established TDF Member witchieblackcat's Avatar
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    I made a one way valved snorkel a few years ago when I wanted a really long snorkel.
    The one way bit was made of several snorkels and the valves and hoselock fittings and was successful.
    The long snorkel idea failed miserably.

  4. #4
    Established TDF Member nigel hewitt's Avatar
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    The problem with NOT sharing the inhale and exhale on a single tube will come when you get water in the inhale side.
    On the usual system a sharp blow squirts it out.
    If that just went out the exhale tube you are going to have to surface and clear everything before continuing.

    This idea converts an annoyance into a serious problem.
    Not recommended I think.
    Helium, because I'm worth it.
    Waterboarding at Guantanamo Bay sounded like a radical holiday opportunity until I looked it up.

  5. #5
    Established TDF Member bubbleless's Avatar
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    I think this guy is looking for a gas mask ... because of covid 19.

    He is looking at the easy breath snorkel mask .... full face
    https://www.decathlon.co.uk/mask-eas...d_8485021.html

    He wants the snorkel to be air in only.... and exhale to go somewhere else...

    Not sure but could be way out of the ball park....

    like a rebreather Full face mask...

    http://www.therebreathersite.nl/06_H.../Picture01.jpg
    Last edited by bubbleless; 03-06-2020 at 11:37 AM.

  6. #6
    Established TDF Member witchieblackcat's Avatar
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    Quote Originally Posted by nigel hewitt View Post
    The problem with NOT sharing the inhale and exhale on a single tube will come when you get water in the inhale side.
    On the usual system a sharp blow squirts it out.
    If that just went out the exhale tube you are going to have to surface and clear everything before continuing.

    This idea converts an annoyance into a serious problem.
    Not recommended I think.
    A long snorkel is not a good idea. Unless you're an elephant you don't have the lung structures to suck air down through it.
    But I had catered for the situation outlined above, my snorkel was connected with hose to a floating section for air in; the exhale just blew out like a reg so if water came in the inhale it could be blown out of the exhale.

  7. #7
    Established TDF Member Nickpicks's Avatar
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    Quote Originally Posted by witchieblackcat View Post
    A long snorkel is not a good idea. Unless you're an elephant you don't have the lung structures to suck air down through it.
    But I had catered for the situation outlined above, my snorkel was connected with hose to a floating section for air in; the exhale just blew out like a reg so if water came in the inhale it could be blown out of the exhale.
    once you get to more than about half a metre, the water pressure on the outside of your lungs makes the work of breathing quite hard to inhale!
    The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair.

  8. #8
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    Withcieblackcat
    Maybe next time something like this may work.
    https://newatlas.com/marine/exolung-...ng-air-supply/

  9. #9
    Established TDF Member bubbleless's Avatar
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  10. #10
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    I do not want to dive with this equipment.
    This oceanreef mask is similar to "easy breath" model from decathlon. I have bought decathlon mask but its valve is not good enouth -
    air can be inhaled even if I have tried to close 'pipe' for incomming air (so it is inhaled through pipe for outgoing air)


 
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