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

[dalegray]

Originally Posted by Janos

I dive independents when abroad, and I find reg swapping a bit of an arse. I can do it, but I prefer not to. Also, I prefer to have the long-hosed reg in the same place throughout the dive, as I'd prefer it if my buddy didn't have to work out which one was which in an OOA situation.

Laters,
Janos

With regards the regs see previous post

With regards your buddy, the instruction I give my buddy is to take the reg in my mouth (unless I am using a rebreather), if they get the short hose we can swap when they have calmed down.

How come people have such a problem with swapping regs? if you are diving twin sets you should be happy with reg swapping to the point you don't think about it at all.

[nigelH]

Originally Posted by dalegray

How come people have such a problem with swapping regs? if you are diving twin sets you should be happy with reg swapping to the point you don't think about it at all.

Probably because we're not there for the buzz of doing technical diving but because there is something we want to see. All the gear we need to get there and back safely is intrusive to the reason for going there and the interactions want to be minimised.

nigelH

[dalegray]

Originally Posted by nigelH

All the gear we need to get there and back safely is intrusive to the reason for going there and the interactions want to be minimised.

I thought you divied a rebreather? PPO2 monitoring can't get more intrusive. But like PPO2 monitoring reg swapping becomes automatic.

I am not saying my system is for everyone, but it works for me, I swap between, side mounts, back mounted twins, back mounted single with pony, and an inspiration, and some methods deveoped for side mounts have spilled over to my methods for back mounts. It is as safe a system as any for back mounts, and meens I have to swap techniques of diving less.

I'll ignore the Buzz comment.

[shades]

This is old has the hills. Manifold, independents, rule of thirds etc.

End of the day it comes down to on thing.. What YOU happy with.

Task loading.. As little as possible please, this dive thing is about enjoyment in my books. Your on twins why? It’s the latest craze, looks cool? I hope not.

As for me I dive twins when I need that extra amount of gas for one reason or another. Redundancy? Carried for the dive that is planed, no more no less. Buddy out of air? You better take this one in my mouth and keep 2m distance or you will get a fin in the back side for needing it. When you get to the stage of needing twins in your diving you better be more self sufficient (solo) than relying on your buddy.

[andy_chesney]

I dive mine half a turn all the time. As has previously been said there is less things to think about and I can concentrate more on the dive and looking at the wreck.

As Digger said it only takes a second to shut the manifold down and carry out with shutting the pillar valve down.

I am not keen on the idea of having to constantly open the valve and reshut this only tasks loads you and in an emergency situation one could forget and end up having more pressure put on them when they take a breath and find the reg has shut down

I would certainly not dive with it all the way open as there is no need and it would only take a few seconds to loose most if not all of your gas especially at 60m.

[dalegray]

Originally Posted by andy_chesney

I dive mine half a turn all the time. As has previously been said there is less things to think about and I can concentrate more on the dive and looking at the wreck.

As Digger said it only takes a second to shut the manifold down and carry out with shutting the pillar valve down.

I am not keen on the idea of having to constantly open the valve and reshut this only tasks loads you and in an emergency situation one could forget and end up having more pressure put on them when they take a breath and find the reg has shut down

I would certainly not dive with it all the way open as there is no need and it would only take a few seconds to loose most if not all of your gas especially at 60m.

Just dive with the center valve shut and swop regs during the dive, only open it if one of the regs packs in

[MarkE]

this is all very romantic, but as surely some are aware manifolds dont ALL open at the same number of turns!!!

some open after half a turn...some after 4 turns...all depends on design and level of wear on seat.

If you aint sure when it opens then....find out. (get dissimilar pressures first)

if you are really not sure get some inspired-training(.com ;-) from a diving (hurts me to put these two words together) professional

I not known for sitting on fences...Im too unbalanced

[Madfish]

........... just dig this one up and see how or if the trend has changed at. Some of the original posters have gone on to greater things and a whole new generation of twin-set divers are created......

Just wondering how do we dive our manifolds now?

Dianne

[Ferg3333]

All the way open, never had a problem reaching or closing valves, also worse case you can only turn it one way. I can see the benefits of having it half a turn but that was not the way I dived my twins before I went CCR.

Although looking back I never thought of the benefits of frequent equalisation, which does seem the safer option overall.

[Madfish]

I know it is an old thread - but I resurrected it to see what, if anything, had changed...........

Di