CCR Bail Out

[Wibs]

OPV not ADV maybe? rEvo is the only unit that I have less interest in than a JJ so no idea about its architecture but not sure how you get water in through the ADV without puncturing or unseating the diaphragm? KISS ADV diaphragm was an absolute bastard, the minute you do any work on it you might as well throw the whole rebreather in the bin as it will never work the same again. OPV was just an Apeks drysuit valve so you could open wide enough that (in theory) it would leak water.

Apologies. Woz wos right; meant DSV mouthpiece not ADV.

Are partially open and leaking DSVs a common problem to most DSVs as they need an exit to blow the flooded mouthpiece water? Not an issue with a BOV as "open" is out through the one-way regulator output valve.

A BOV should mean that loop water could be blown out through the regulator, i.e. de-water the loop.

[notdeadyet]

Apologies. Woz wos right; meant DSV mouthpiece not ADV.

Are partially open and leaking DSVs a common problem to most DSVs as they need an exit to blow the flooded mouthpiece water? Not an issue with a BOV as "open" is out through the one-way regulator output valve.

A BOV should mean that loop water could be blown out through the regulator, i.e. de-water the loop.

Didn't they say the rEvo didn't need a BOV because it has two scrubbers?

On a Golem BOV, yes you can blow water through the second stage but you won't fully clear it. When you close the barrel you trap a slug of water between it and the flapper valve so some will always end up in the exhale hose.

[Woz]

Apologies. Woz wos right; meant DSV mouthpiece not ADV.

Are partially open and leaking DSVs a common problem to most DSVs as they need an exit to blow the flooded mouthpiece water? Not an issue with a BOV as "open" is out through the one-way regulator output valve.

A BOV should mean that loop water could be blown out through the regulator, i.e. de-water the loop.

On a DSV on an Inspo you blow out the small volume of water in the mouthpiece before the barrel and it exits through a hole in the bottom. Then when it's dry, rotate the barrel and you're back on the loop.

However in a stunning piece of shite design, the internal barrel can be put in the wrong way round so it breathes right to left, and the mouthpiece will then nearly, but not quite, close, and nearly, but not quite, open. The handset will also beep at you like crazy as the loop is running backwards.

You'll be glad to hear with the new ribbed mouthpiece this isn't a problem as they have moved the mouthpiece off-centre so it's obvious, and switched to a lever operated barrel like everyone else instead of the stupid two handed thing. And also got rid of the stainless screws mashed into the threads that if one of my lads did here at work he'd get a clip round the ear for being daft.

[Wibs]

Didn't they say the rEvo didn't need a BOV because it has two scrubbers?

What's the three "must bail out" reasons: CO2, flood & caustic. Whilst the Revo's good for the first, it's still needed for the others - and arguably not as loop-flood proof as per large front-mounted lungs.

I got the BOV following my bailout. The Revo BOV is pretty small and it very simple to bail out by just moving the lever, so there's no faff barrier (e.g. pulling out the reg+hose and stowing it away).

Also enables bailout tins to be sidemounted back under the armpits, not snagging the wreck and tucking the bailout hoses neatly beside your body.

[Mark Chase]

IMHO any CCR without a BOV is dangerous. I got my first CCR in 2004 (inspo classic)and by the end of 2004 it had a HUD and BOV

I also had a Hammer head, rEvo Kiss and JJ analog unit. all had BOV's & HUDS

My rEvo unit had an overpressure valve that could be used for flood clearance. But it which could fail when doing a giant stride into the water. I believe they later removed this.

The rEvo didn't last long as my unit of choice due to the travel problems, weight and issues with getting at the lungs, I kind of loved it and kind of hated it.

[leeiom]

breathing hose was compleatly dry

[leeiom]

UPDATE-

JJ has been in shop and fully tested - its holding pos and neg for 24hrs so it been put down to CL dump cord tangled / pulled. when i got it back i took the head orings off and gave them a good clean / grease. i did a 20m dive for a hour on sat and had about a teaspoon of water in the bottom of the unit, most likley resudal from after it flooded and i rinsed it with fresh.

[leeiom]

I wonder if the fall knocked the base of the scrubber can enough to allow water in under there. It can look like a solid piece but the JJ can is a tube with an end cap and o-rings.

Thanks for posting. Shit happens. It seems like you learned from it.

Most certinaly learned from it... hopefully ill never have to do a b/o again unless its in training

[leeiom]

I should of mentined - ive only been a ccr diver for about 3 months including training so have next to no experiance at all minuis classroom and 20hrs on the unit.

youve defilntly had your fare share of oh shit

[Wibs]

Most certinaly learned from it... hopefully ill never have to do a b/o again unless its in training

Hope you do have a successful bailout -- should you need it. Crap happens with rebreathers. Bailouts are sometimes necessary, even if its just for sanity breaths and back on the loop.

Bailing out is a good thing. Something you should practice on every dive.