Bad design of boris'sloop?

CCR900

Drmike.

You are probably closer to CCRB than most (me thinks?) would you know if they are close to correcting the OPV issue. I must say though I have been blessed with a good OPV.....

F

iani

They see the larger OPV plate as the solution, it remains to be seen if that's what caused my flood last weekend but as it was on the exhale side it's most likely.

Ian

iani

In my case at Scapa I had a mouthful of caustic and baled out onto the OC reg on the side of the FFM. My flood last weekend was on the exhale side and I baled out as I had frankly had enough of the unit! I was only in 11m of water to test the damn thing and it had failed again so I came off and got out the water.

Ian

Marc T

Could you please explain that part a bit more?

Cheers

Marc

CCR900

Marc

As in my Boris, over the past 60 hours or so, hasn't had a problem with the OPV.....time will tell.

F

SteveL

Mike - if I get water into the CL on the 15.5 couldn't I do the same and force the water out the OPV? Not saying its easy but possible ....

Now having said that I guess the question is where did the water come from in the first place - if it is from the mouth piece popping off (say) then water cannot go back along the inhale hose only down the exhale which exits into the top of the centre section so the only way then to get that water into the bottom would be to go vertical so the water could run into the bottom section where it could be vented BUT that would soak a great deal of sorb and be really caustic water in the bottom -

hmmmm you are right very hard to recover the 15.5 in this case

BUT hyperthetically if the flood was on the inhale hose then by being horizontal it "MAY" be possible - particulary if it was not a full flood and the water didn't get to the sorb.

I once had the bottom latch not enguage and the bottom of the plexidome lifted up just a tad on ascent as the loop volume increased slightly and flooded the loop - I got a gob full to toxic sh*t - I bailed out in this case but when I got to the end of my last stop I went back on the loop to see if it was still breathable and amazingly - it was!! - didnt taste too good but breathable all the same - did a bunch of flushing so the OPV was blowing off hoping that any water would be pushed out.. breather seemed to be working OK -

Back on the boat I found that there was water still sloshing around in the top section of the centre section about 50mm (2 inches for you "others" ) the foam pad had completely disintergrated (read dissolved) about 1/3 of the way up - there seemed to be very little water in the bottom section.

So I guess there are no diffinative methods for flood recover as you would have to understand what has caused the flood in the first place - I would never have imagined the dome would pop - a hose tearing yes - a mouthpiece popping off yes - or dropped yes but not that

Anyway thats my 2 bob worth.

Steve

PS you could always get a dual Rebreather and not worry about it -
Im sure you know an Aus. that might be able to help out

Phil

Probably blessed too... since I never had any issues with the OPV, about 150 hours on the unit.

I think that proper maintenance in a clean environnement should avoid any issues with the OPV. This is not always the case depending on your diving location and conditions, I can easily see the issue for Mike with the travelling and locations he goes to.

CCRB came up with the solution of the hydrophobic membrane to avoid sofnolime ending in the CL, which works well. But you might get other type of crap in the CL, example when you leave the unit open for drying! The mesh might be an idea!

Cheers,

__________________
Phil
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CCR/OC Instructor
CCR Training to Mixed Gas in Switzerland, France, UK & Germany on
Megalodon/KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel

www.zerogravitydiving.com

Nad

Same for me yet.

Absolutely agree!
Ok for diving locations and conditions problems.
Proper maintenance and cleaning are the key words, for every rebreather!
The 5 more minutes needed for OPV (or whatever else) checks are not really important but they could do the difference underwater.
Beside "take your time" I don't really know what else to say!

Best,

Nad

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The Impossible is often the Untried

richc

I have 2 Boris' (OK, I have one, the missus has the other) and we've not had any serious OPV issues. I think once we've got a grain of lime in there and found it on a negative test. But between us it's never proven to be an issue when we've dive the units so far...

Drmike

Sure can. The condensation that comes off te dome drips down into the CL and is cleared in just that way during normal use.

Sure do and I think the dual Meg is really my top favourite other bit of kit to be honest. If I didnt have Boris (and a MK15.5) and if I didnt dislike OTS lungs Id seriously be looking at putting one together myself

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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