Mailing List Archive Mailing List Archive
---------- From: <ALongtin@ao*.co*> Sent: Thursday, September 26, 1996 4:41 PM To: trout@mo*.gu*.ne*; anscott@ns*.co*.au*; techdiver@terra.net Subject: Re: SPG and Reg on Deco Bottles --- George Jump In here In a message dated 96-09-24 21:09:53 EDT, trout@mo*.gu*.ne* (Jesse Armantrout) writes: > As a minimum, put button type spgs on deco bottles and real spgs on stage > bottles. Any bottle being dropped must be checked at the point of dropping. > If it is not what you expect, the dive is over. Even if you are carrying > the bottle with you the whole dive, the peace of mind is worth it. If you > try it both ways, you will agree. I already agree, but I can see where Scott is coming from too. Personally, the risk of not being able to verify tank psi is greater than the risk of having an hp hose go BOOM. > Come on guys, this is tech diving 101. If only George would publish operating procedures and standards. <sigh> ALongtin@ao*.co* *************** Speaking purely as a wreck diver, SPG's on deco tanks are a waste of time. You don't have to be a genius to see why, but I will spell it out for the slow ones. First, you need to check the contents of your deco tank pre dive, and be near the tank from that point onwards. Any leaks or reductions in pressure will then be blatently obvious to to even the most henious of strokes. All good wreckdivers will have the valve shut off, once the lines have sufficient pressure to prevent water intrusion. Thus there will be no loss of gas from the original pressure unless: your burst disc fails, or your tank valve fails. Either way, you are no better off if you have a SPG. And as some of you know, the burst discs should be blocked. If your reg fails when you switch it on, well you either breath using the tank valve, or change regs. There should be at no stage any serious loss of gas. As too waiting for George to tell you how it's done, well he would be the first to admit the right way is always the easy and obvious way, and once seen or described, needs no explanation. troppo BTW, if you must use a SPG, you will find they screw straight into the 1st stage, so you need no hose at all. Tape replaces an o-ring, not exactly kosher on non tapered threads, but works. Any leak will be minor, and insignificant compared to a blown o-ring. I only recommend it for use on surface regs.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]