The purge cover is a two part affair with the S600 and has more potential to be mis-assembled underwater than a G250.
But I agree with the other Larry on questioning the idea of some divers taking a second stage apart underwater. It may make sense for a properly trained diver in a cave sitting on the bottom with little or no water flow, but for most divers in open water? I supect many people who select a reg for this reason do it for the cool factor, and to say they have the capability regardless of whether they will ever have a need for that capability or not. At least I hope so.
In my experience, it can be hard to get the diaphragm to seat properly if it is wet, let alone underwater, and on the rare ocassions where I have gotten something in a second stage, it usually much easier to shake it out the same hole it entered.
Another option is to leave the LP hose fitting finger tight to facilitate swapping a non functioning second stage on one stage bottle with a functioning second stage on another.
I have also heard the argument about a smaller second stage creating less jaw fatigue, but it is not the size that counts in the water but rather the bouyancy traits and size is only one small factor in that equation.
There are also far bigger villans responsible for jaw fatigue than the weight/size/bouyancy of the second stage. Mouthpiece design and fit is much more important as is having an LP hose of the proper lenght. A hose that is too long or too short will push or pull and cause much more strain than the second stage itself.
Larry
But I agree with the other Larry on questioning the idea of some divers taking a second stage apart underwater. It may make sense for a properly trained diver in a cave sitting on the bottom with little or no water flow, but for most divers in open water? I supect many people who select a reg for this reason do it for the cool factor, and to say they have the capability regardless of whether they will ever have a need for that capability or not. At least I hope so.
In my experience, it can be hard to get the diaphragm to seat properly if it is wet, let alone underwater, and on the rare ocassions where I have gotten something in a second stage, it usually much easier to shake it out the same hole it entered.
Another option is to leave the LP hose fitting finger tight to facilitate swapping a non functioning second stage on one stage bottle with a functioning second stage on another.
I have also heard the argument about a smaller second stage creating less jaw fatigue, but it is not the size that counts in the water but rather the bouyancy traits and size is only one small factor in that equation.
There are also far bigger villans responsible for jaw fatigue than the weight/size/bouyancy of the second stage. Mouthpiece design and fit is much more important as is having an LP hose of the proper lenght. A hose that is too long or too short will push or pull and cause much more strain than the second stage itself.
Larry
