OMS wing and twin 7l - Content Guage on Twins?

[Johnny Boy]

Just ventured into the world of the wing and twin set ! Unsure of whether to bother with twin contents gauges though. I'll have the manifold valve open, so is there a need? Any thoughts?......

[daz]

Nope.

If the manifold is open then you can see the pressure anyway.

If you have to Isolate in anger then you are going up anyway.

Daz

[Jules]

same as me, OMS wing back plate and twin 7s, its a dream to dive! No, dive with the manifold fully open and you will only need one contents gauge. Dont introduce more points of failure than you need. (all IMHO)

Oh and make sure you can shutdown everything should you need to..

Jules

[Johnny Boy]

ta very much. As I say, i'm new to the whole twin and wing thang. Do you rate OMS gear?

[Jules]

I am happy with mine but then havent really looked too closely at other brands.

[Johnny Boy]

I looked at some reviews of halcyon and dive rite, but was swayed by the expert selling techniques of Divers Warehouse. I just love those bungees that keep it all neat. You cant beat a bit of rubber.....

[Woz]

Narked at 60 stuff is getting a good reputation and is made in the UK:
www.narkedat60.com
If you dive with the isolator fully open then use a single gauge but if only 1/2 a turn open use a gauge on each pillar so you know the cylinders are equalising enough. Also, you MUST shut the isolator at 100 bar and finish them off as indies as if a hose goes pop at 30m your twin 7's will drain too far to give you enough gas in one with the isolator shut and the problem side still draining fast. Also isolate if going into a confined space where you won't be able to reach the iso valve.
I dive twin 7's and find them extremely comfortable. A good choice.

[wilbo]

surely even with the manifold cracked just half a turn there would be little or no back pressure within the manifold - i.e. the cylinders should equalize just fine, as the rate of gas you are breathing of your primary wouldn't be near the equalising rate of a 1/2 turned manifold..

or am I missing something?

[Dr Stevil]

Originally Posted by Johnny Boy

ta very much. As I say, i'm new to the whole twin and wing thang. Do you rate OMS gear?

Well the American government certainly does!
OMS bungeed wings (read 'em and weep GUE boys ) are the standard-issue kit for twinset diving under NOAA regulations, which is how I ended up with my OMS kit

[Dr Stevil]

Originally Posted by wilbo

or am I missing something?

No you're not missing anything, like many others I dive with mine open about a quarter turn, that way there's no confusion in a FUBAR, if the isolator ain't shut with one half-turn of the wrist, then do it the other direction, takes less than two seconds even if you do get it wrong, either way it's as good as instantaneous in my book