Help! Which came first?

[nigelH]

Originally Posted by Digger

OK, which comes first - the scrubber or the bag.

After reading Richard Pyle on scrubbers he makes a very strong case for two counterlungs before and after so the gas rate in the scrubber is smoothed out making it more efficient and the WOB controlled. Also the one before is the primary water-trap.

nigelH

[Digger]

OK, more crazy ideas in the Digger camp now.

John, couple of problems - I think the scrubber being in the counterlung is going to cause major problems - if you have a good way of doing this I'd be very interested in how, but it's not something I've seen done before, and seems unecessary even on CE marked units etc. Maybe better to insulate the scrubber separately? I'm going to have a neoprene sleeve over mine as it basically won't get pre-breathed if using it for deco.

On the double counterlung thing - why not have another ABLJ inner bag attatched to me? If I have 2 in the same bag it won't make any difference to how streamlined I am will it? And depending on where I have the O2 injection and eventual dil inject I can put it into either bag...

Another idea I had was to get a clear bag of some sort (similar to the Dragers I've seen) which will be small and hang down a little from the unit when in use, so I can see if there's cocktail coming my way, and so could a buddy. It would also catch the cocktail, or at least some of it, so I'm a safer bunny. Any suggestions on what sort of bag and where from? And I'm not using bin-liners. If only those wine bags were clear.

Thanks for the help so far. Any other ideas?

Digs.

[wreckweasel]

You can get clear dromedary bags.....

Also, goto a campling shop and buy one of those super absorbent towels... roll it up and stick it in your exhale lung... they absorb a bucket load of water.

[Andrew H]

Surely it would be easier to exhale into the bag rather than through the scrubber into the bag. The bag should be easily emptied through the scrubber by water pressure.

Andrew

[Mdemon]

The idea was to keep the size down. The insulation and leak stopping were an added bonus. I'm going to use the arse-end of a DSMB - diameter approx 14cm so I need a scrubber to match. Neoprene sleeve inside to give the jubillee clips something to seal into.

Why not an inner bag inside the ABLJ? Two would be very unwieldy...

Why not a clear acrylic T-piece with absorbant stuff at the bottom? Tough and see-through...

[narked at 90]

hi digger what i was thinking was if your bag is plastic inside then i've got a friend that can seam weld it into two halfs to give you inhale/exhale in the same space then just plumb the scrubber into the bottom half of both and your twin hose with valves in the top half and inject o2 as you were going too with the dry suit inflater
its working in my head but i've had a drink!
john

[Mdemon]

Originally Posted by Andrew H

Surely it would be easier to exhale into the bag rather than through the scrubber into the bag. The bag should be easily emptied through the scrubber by water pressure.

Andrew

That makes sense. Let's get Digger-the-guinea-pig to try it for us...

[Digger]

John, it might have legs. That said, I think I have a source for reasonably priced ABLJs now, so I can take the inner bag (John, you had the same idea I did, but you were much better at expressing it!) and put it in with the other one. I was worrying about counterlungs with a volume potentially of around 40 litres, but if they're both in the same bag, the max is still 20. And I'd be very surprised if it was even that much. I could always pack it out a bit, but then this could quite easily become redundant buoyancy for many dives with up to twin 12s, so is kind of useful if it all goes horribly wrong.

So, now we're onto mouth, bag, scrubber, bag, mouth. Not one of the options, but I can see how to do it. And it makes my head much more manouverable, because the scrubber doesn't have to move. Ideal. Oh, and I don't need to cut any more holes in the ABLJs. It is still technically possible to return the two collars to factory spec.

All great ideas guys. I'm lovin' it.

Digs.

[Digger]

I did have a brain-wave when someone was joking about the inner tube wing today, why not an inner tube counterlung wing? WHy not just a counterlung wing as is? Finally making use of all that space behind my shoulders!

Anyone got an inner bladder for an OMS 50 they want to part with? All going to a good cause...

[Mdemon]

I was planning to use an old Buddy Auto Air tweaked to do the same thing. Inflate to add O2 and breathe through the main tube by holding the button in. Tried it untweaked today. It "sort of" worked...