checking mouth piece integrity

**jmurba** · 25th June 2007, 07:37

Hi all,
Yesterday I entered the water, at 10m I heard a gorgeling, as I had successfully did the negative and positive pressure test I went on a bit, but switched to OC one minute later.
The mouth piece was punctured, and it was not possible to realize it doing the pressure test because when we do it we suck or blow in the dsv and then shut the dsv making it impossible to realize if the mounth piece is punctured or not !!!
So check you mouth piece integrity and perform long enough bubble and breathing test at shalow depth befor diving deep .
god even after years of ccr we all still learn....
regards
jean mi

Silent · 25th June 2007, 09:17

On both my Meg & Boris course I was taught to suck and blow through the mouthpiece with the dsv closed to check for exactly this kind of failure or to see if the cable tie holding it on had come loose.

Anyway glad to hear you came out of it unharmed.

Stephane · 25th June 2007, 09:30

Quote: (Originally Posted by Silent)

On both my Meg & Boris course I was taught to suck and blow through the mouthpiece with the dsv closed to check for exactly this kind of failure or to see if the cable tie holding it on had come loose.

Anyway glad to hear you came out of it unharmed.

Hi,

On a Ray DSV this is not possible because there is a hole to blow water off before opening it.
So this test can be achieved when air was sucked and mouth still on the mouthpiece, just hold on for a while and listen for any noise.

UKSteve · 25th June 2007, 10:39

The check won't work on an Inspiration either...air will escape out of the bottom of the DSV unless you block the outlet with a finger.

So ..on a Meg how do you clear the mouthpiece when going back on the loop under water?

Steve

Gilles · 25th June 2007, 11:59

Quote: (Originally Posted by UKSteve)

The check won't work on an Inspiration either...air will escape out of the bottom of the DSV unless you block the outlet with a finger.

So ..on a Meg how do you clear the mouthpiece when going back on the loop under water?

Steve

Same/similiar thing. When you blow, there's a small hole out the bottom.

Drmike · 25th June 2007, 13:11

I think most if not all dsvs have a small flush hole - I just stick my finger over the hole when sucking/blowing to check the mouthbite...well not on my boris seeing as mine doesnt have a mouthbite

UKSteve · 25th June 2007, 13:47

Quote: (Originally Posted by Drmike)

well not on my boris seeing as mine doesnt have a mouthbite

Lol..I guess you breath in hard and if your eyeballs pop out of their sockets its a pass?

Steve

Drmike · 25th June 2007, 14:00

Quote: (Originally Posted by UKSteve)

Lol..I guess you breath in hard and if your eyeballs pop out of their sockets its a pass?

Steve

that reminds me of a girl I used to know

**Freef** · 25th June 2007, 14:41

It is checked as part of the kit assembly, surely?

One way valves in, hoses on, check the flow and seal of the one way valves by placing the hoses against your cheek [or hand if you have a beard] and blow and suck. Any mouthpiece problems will show as a leak.

Then the hoses are assembled to the rest of the unit for the pos and neg tests.

UKSteve · 25th June 2007, 16:25

Good point.... actually I do that check every time I install the front loop... and indeed it would show up problems with the mouthpiece...

Steve

25th June 2007, 07:37	#1 (permalink)
jmurba wet bear Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: May 2006 Location: cannes france Posts: 659	checking mouth piece integrity Hi all, Yesterday I entered the water, at 10m I heard a gorgeling, as I had successfully did the negative and positive pressure test I went on a bit, but switched to OC one minute later. The mouth piece was punctured, and it was not possible to realize it doing the pressure test because when we do it we suck or blow in the dsv and then shut the dsv making it impossible to realize if the mounth piece is punctured or not !!! So check you mouth piece integrity and perform long enough bubble and breathing test at shalow depth befor diving deep . god even after years of ccr we all still learn.... regards jean mi __________________ when will I be able to think about something else then spending hours underwater, when will I be normal ? http://web.mac.com/jmurba/Site_2/home.html http://web.mac.com/jmurba/Site_3/home.html
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25th June 2007, 09:17	#2 (permalink)
Silent Staying Silent! Mostly... Current Rebreather/s: Megalodon Other Rebreather/s: Ouroboros Join Date: Jun 2005 Location: Northants, UK Posts: 381	Re: checking mouth piece integrity On both my Meg & Boris course I was taught to suck and blow through the mouthpiece with the dsv closed to check for exactly this kind of failure or to see if the cable tie holding it on had come loose. Anyway glad to hear you came out of it unharmed.
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25th June 2007, 09:30	#3 (permalink)
Stephane Hey! Ho! Let's go! Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Nantes - France Posts: 708	Re: checking mouth piece integrity Quote: (Originally Posted by Silent) On both my Meg & Boris course I was taught to suck and blow through the mouthpiece with the dsv closed to check for exactly this kind of failure or to see if the cable tie holding it on had come loose. Anyway glad to hear you came out of it unharmed. Hi, On a Ray DSV this is not possible because there is a hole to blow water off before opening it. So this test can be achieved when air was sucked and mouth still on the mouthpiece, just hold on for a while and listen for any noise. __________________ Stéphane Hammer-rEvo powered!
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25th June 2007, 10:39	#4 (permalink)
UKSteve Still a novice... Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 557	Re: checking mouth piece integrity The check won't work on an Inspiration either...air will escape out of the bottom of the DSV unless you block the outlet with a finger. So ..on a Meg how do you clear the mouthpiece when going back on the loop under water? Steve
(Online)

25th June 2007, 11:59	#5 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: checking mouth piece integrity Quote: (Originally Posted by UKSteve) The check won't work on an Inspiration either...air will escape out of the bottom of the DSV unless you block the outlet with a finger. So ..on a Meg how do you clear the mouthpiece when going back on the loop under water? Steve Same/similiar thing. When you blow, there's a small hole out the bottom. __________________ Gilles http://www.dirrebreather.com
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25th June 2007, 13:11	#6 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,062	Re: checking mouth piece integrity I think most if not all dsvs have a small flush hole - I just stick my finger over the hole when sucking/blowing to check the mouthbite...well not on my boris seeing as mine doesnt have a mouthbite __________________ Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you
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25th June 2007, 13:47	#7 (permalink)
UKSteve Still a novice... Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 557	Re: checking mouth piece integrity Quote: (Originally Posted by Drmike) well not on my boris seeing as mine doesnt have a mouthbite Lol..I guess you breath in hard and if your eyeballs pop out of their sockets its a pass? Steve
(Online)

25th June 2007, 14:00	#8 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,062	Re: checking mouth piece integrity Quote: (Originally Posted by UKSteve) Lol..I guess you breath in hard and if your eyeballs pop out of their sockets its a pass? Steve that reminds me of a girl I used to know __________________ Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you
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25th June 2007, 14:41	#9 (permalink)
Freef Custom Title Disallowed! Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Jan 2006 Location: Land of the Freef, UK. Posts: 1,356	Re: checking mouth piece integrity It is checked as part of the kit assembly, surely? One way valves in, hoses on, check the flow and seal of the one way valves by placing the hoses against your cheek [or hand if you have a beard] and blow and suck. Any mouthpiece problems will show as a leak. Then the hoses are assembled to the rest of the unit for the pos and neg tests. __________________ David. Currently owner of two differently sized ankles.
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25th June 2007, 16:25	#10 (permalink)
UKSteve Still a novice... Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 557	Re: checking mouth piece integrity Good point.... actually I do that check every time I install the front loop... and indeed it would show up problems with the mouthpiece... Steve
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