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Scuba Forum / General / March 2004

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Can breath through a reg when not connected to air tank - reason to be worried

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Ed - 14 Mar 2004 15:15 GMT
I am off on a diving holiday (yippee!) the week after next.  I have
just got my equipment out to check it all looks ok, see if anything is
fraying, etc.

The reg rig is obviously not attached to a tank but I seem to remember
that you can't breathe through them in this condition.  That is the
case with the octopus but on the main reg, if I breathe in real hard I
can get air through it.

Is this anything to be worried about?  A symptom of anything untoward?

Thanks in advance

Ed
R Benner - 14 Mar 2004 15:49 GMT
> I am off on a diving holiday (yippee!) the week after next.  I have
> just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 10 lines]
>
> Ed

A symptom of wanting to go diving REALLY BADLY.
Brian Nadwidny - 14 Mar 2004 16:19 GMT
> I am off on a diving holiday (yippee!) the week after next.  I have
> just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 8 lines]
>
> Thanks in advance

You shouldn't be able to. I'd get it checked.

Brian
Edmonton, Alberta
www.mossmanscubaventures.com
Matthias Voss - 15 Mar 2004 17:22 GMT
Brian Nadwidny schrieb:

> > I am off on a diving holiday (yippee!) the week after next.  I have
> > just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 10 lines]
>
> You shouldn't be able to. I'd get it checked.

;-)

Of course you can breathe through a reg not attached to a tank.

What you should not be able to do, is, breathe , when it is, and tha
valve closed.
This is a sign of a defunct exhaust valve.

Matthias
Brian Nadwidny - 16 Mar 2004 02:12 GMT

> Of course you can breathe through a reg not attached to a tank.

You're right. I had just assumed he did the check with a dust cap on as
he said he could breathe through one 2nd but not through the other.

Brian
Edmonton, Alberta
Alan Street - 14 Mar 2004 16:42 GMT
#I am off on a diving holiday (yippee!) the week after next.  I have
#just got my equipment out to check it all looks ok, see if anything is
#fraying, etc.
#
#The reg rig is obviously not attached to a tank but I seem to remember
#that you can't breathe through them in this condition.  That is the
#case with the octopus but on the main reg, if I breathe in real hard I
#can get air through it.
#
#Is this anything to be worried about?  A symptom of anything untoward?
#
#Thanks in advance
#

If the dust cap is in place on the first stage, something's leaking,
probably the exhaust valve in the second stage. If the dust cap isn't
in place, you can usually pull a little air through the regulator by
breathing hard.

An exhaust valve that only leaks when you breath hard against it isn't
a huge deal, but it means it's time to for an anual service (it also
means the reg might breathe a little wet). Persoanlly (and remember
that personal opinions will vary considerably), I'd have it serviced if
there's time (some shops can turn it around in a couple of days. Some
take weeks). If not, I wouldn't worry too much about it, knowing
there's a reasonable chance the rental reg you'd get will have the same
problem.

(x-posted to rec.scuba.equipment)

Alan
Mike Painter - 14 Mar 2004 21:11 GMT
> #I am off on a diving holiday (yippee!) the week after next.  I have
> #just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 25 lines]
>
> (x-posted to rec.scuba.equipment)

You also want to find where the air is coming from. A mushroom valve can be
the problem if you are sucking real hard.
Jon C - 15 Mar 2004 05:54 GMT
> I am off on a diving holiday (yippee!) the week after next.  I have
> just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 10 lines]
>
> Ed

That's fine, unless the dust cap is on.  Then something's wrong.
Ed - 15 Mar 2004 18:43 GMT
> > I am off on a diving holiday (yippee!) the week after next.  I have
> > just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 12 lines]
>
> That's fine, unless the dust cap is on.  Then something's wrong.

I believe the dust cap was secure - if by dust cap you mean the rubber
ball that is clamped into the first stage when it is not on a
cylinder.

Funny my reg and octopus are both TX40s and the latter does not allow
any breathing.  I should stress the first needs to be "sucked" very
very hard but there is discernable air - not enough to survive on.

You guys have got me worried enough to email ahead to see if the dive
place can service it on my first day whilst I use a rental one.

Any other comments?

cheers

Graham
Jon C - 15 Mar 2004 18:50 GMT
> > > I am off on a diving holiday (yippee!) the week after next.  I have
> > > just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 23 lines]
> You guys have got me worried enough to email ahead to see if the dive
> place can service it on my first day whilst I use a rental one.

There's nothing to be worried about.  You're supposed to be able to breathe
through the reg when it's not attached to a tank.
Alan Street - 15 Mar 2004 19:14 GMT
>> "Jon C" <news@jonnythan.com> wrote in message
>news:<aGa5c.8033$Oo5.2783@twister.nyroc.rr.com>...
[quoted text clipped - 18 lines]
>> ball that is clamped into the first stage when it is not on a
>> cylinder.

That's what I mean.

>> Funny my reg and octopus are both TX40s and the latter does not allow
>> any breathing.  I should stress the first needs to be "sucked" very
[quoted text clipped - 5 lines]
>There's nothing to be worried about.  You're supposed to be able to breathe
>through the reg when it's not attached to a tank.

Not with the dust cap on the first stage (I can't with my TX-100s). He
probably has a leaky exhaust valve (aka - mushroom valve).
Rich Lockyer - 16 Mar 2004 09:17 GMT
>> I believe the dust cap was secure - if by dust cap you mean the rubber
>> ball that is clamped into the first stage when it is not on a
[quoted text clipped - 9 lines]
>There's nothing to be worried about.  You're supposed to be able to breathe
>through the reg when it's not attached to a tank.

Not when the dust cap is in place.

 --- Rich
 http://richlockyer.tripod.com/
Al Wells - 15 Mar 2004 20:14 GMT
> Funny my reg and octopus are both TX40s and the latter does not allow
> any breathing.  I should stress the first needs to be "sucked" very
> very hard but there is discernable air - not enough to survive on.

> Any other comments?

Look at the O ring where the hose connects to the second stage.
Charlie Hammond - 15 Mar 2004 22:38 GMT
>I am off on a diving holiday (yippee!) the week after next.  I have
>just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 6 lines]
>
>Is this anything to be worried about?  A symptom of anything untoward?

You can't really check out a regulator unles you (1) connect it to
a SCUBA cylinder and (2) dive with it.

If it has been a while, do a dive before you go on holiday.
Even if it is only in a local pool.

Signature

     Charlie Hammond -- Hewlett-Packard Company -- Ft Lauderdale  FL  USA
         (hammond@not@peek.ssr.hp.com -- remove "@not" when replying)
     All opinions expressed are my own and not necessarily my employer's.

Adam Helberg - 16 Mar 2004 00:51 GMT
> I am off on a diving holiday (yippee!) the week after next.  I have
> just got my equipment out to check it all looks ok, see if anything is
[quoted text clipped - 10 lines]
>
> Ed

Put saran wrap over the exhaust of the 2nd stage. If the leak stops you know the exhaust
valves are incompetent.

If the leak continues, take the 2nd stage with hose off 1st stage and plug end of hose
with Saran Wrap. If the leak stops the leak is in the 1st stage or hose fitting.

Adam
 
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