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Example - your spg goes fizz bang and disappears off into the blue. In this case as you know the guage is run by the primary post, all you need do is shut that, switch to backup and go....
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The SPG is fed from the left side or secondary post, as is the backup reg and drybag inflation (If not using an Argon bottle that is).. You've been at Emmas cooking sherry again haven't cha Drifty me ol'cock! Also you'll notice that I already agree that in a real situation I'd would go for the isolation first, but!
I was talking of practise routines.. you know, like turn off primary valve, breath down reg, move to backup reg, open primary valve, close isolation valve, open isolation valve, close secondary valve, breath down reg, move to primary reg, open secondary valve...... check time taken etc..
There appears to be some variation in routines according to who you ask, I was just initially trying to get a handle on.. as the thread title say.. "Isolate and Shutdown routines" so that I can practise them in the wet, but things have moved on since I first asked the question months ago and I think I'll go with the GUE method described above..
Regards
Dave.
(Edited by Dave Williamson at 6:32 pm on Dec. 10, 2002)