Manifolds on Twins: It's an open and shut case

[Digger]

Right then. Finally a poll to end all polls, and I want justification too.

Manifold open all the way, half a turn open, or closed and open it now and again during a dive.

Personally, I'm a half a turn open kind of guy - I have my reasons, but I want to hear yours. Juz and young Padowan were trying to convince me to have it closed and opena nd shut it regularly during a dive, but I'm not even slightly convinced. Think you could do better?

So, let the games begin. And Juz, if I get more votes than you I demand an apology. Whether I get one or not I don't care, but I feel the need to demand one. Only because I couldn't really put an argument together at the weekend.

[Andy the Coastie]

closed and open it now and again

Bit like ya eyes..........

Wide awake now are we

You heard my views on Sunday

[divegyrl]

but you did say "if the hole was tight enough you would do it"

or was that in a different context?

Blanaid

[Padowan]

See attachment - it's official, 100% of voters said their cats preferred to run it shut and open it from time to time.... you gotta get in there quick for this kinda discussion...

[Juz]

Ok, here goes, and I'm sure young Padowan will join me shortly!


All the way open - i think everyone sees this as a non-starter

My way, shut and equalise when it's convenient to do so:
This way, in effect has all the advantages of manifolded twins and independent twins without any of the disadvantages. If it all goes to shit, I have at least half my gas saved without doing anything, and I could then potentially sort the problem and still have access to the gas in the offending cylinder. If you dive with a slob knob, this method proves even better as a failure of the slob know (when it's being used at a convenient time not in an emergency) means you have a closed manifold.

Part open
It is unlikely, but you could have a problem at exactly the same moment you get stuck in a tight space or you arms perhaps get trapped, then you are constantly losing gas. At least the pervious way, you have 1/2 your gas and therefore time to get out of the jam.


Bring it on!

Juz

[Digger]

If it's tight enough I'l do anything, but we're not getting into that discussion, and not on this forum!!!!

All I said was that if I was going into a hole where I couldn't get to the isolator, I might consider closing it before getting my little bottom in there. There are very very few holes that small, as I find myself in a different rig usually to get into holes like that.

We've got 1,2,4 split at the moment, and I think this is going to go against you boys. You've not even put your argument together yet! You're not going to win a poll that way!

[beanie]

Originally Posted by Padowan

See attachment - it's official, 100% of voters said their cats preferred to run it shut and open it from time to time.... you gotta get in there quick for this kinda discussion...

nutts I was only away for 2 mins that's MD for ya

1/2 turn open - cause its close to closed but open enough so I can forget about opening it on the dive

[Juz]

Originally Posted by Juz

All the way open - i think everyone sees this as a non-starter

Or perhaps not - 4 votes - can you help me understand the benefits of this way?

Juz

[Reeve]

I voted open all the way as I don't have an isolator on my manifold.

However if I did have an isolator it would be kept shut. Only being opened up only when the cylinder being breathed off was down to 50 bar, then once pressure balanced shut off again.

rgds g.

[Juz]

Originally Posted by Reeve

I voted open all the way as I don't have an isolator on my manifold.

However if I did have an isolator it would be kept shut. Only being opened up only when the cylinder being breathed off was down to 50 bar, then once pressure balanced shut off again.

rgds g.

That's actually a vote for US!!!!!! Go Team Kinky!

Juz