Posted by bartman |
- Re: Is a single tank equipped with an H-Valve considered acceptable redundancy
Posted by Cheryl
on 7/2/2009, 3:54 pm, in reply to "Is a single tank equipped with an H-Valve considered acceptable redundancy"
68.39.59.231For the purposes of "technical diving/training" it is. NAUI Tech training calls for the use of doubles or a single tank with an H valve. Air share and use of 1/3's being the bailout for same and running out of air being frowned upon.
Do I agree? I believe it can have its place and purpose in shallow diving (inlets....railroad bridge..... training) Personally.....I dive doubles or w/ a pony. - Re: Is a single tank equipped with an H-Valve considered acceptable redundancy
Posted by Alek
on 7/2/2009, 3:53 pm, in reply to "Is a single tank equipped with an H-Valve considered acceptable redundancy"
155.78.121.3As well as one regulator being dependent on the other what about burst disks? - What is a burst disc?
Posted by bartman
on 7/2/2009, 10:09 pm, in reply to "Re: Is a single tank equipped with an H-Valve considered acceptable redundancy"
Moonsnail MasterI dont get it, i thought they were called boots???
confused?
bm-mi
- Re: What is a burst disc?
Posted by John
on 7/3/2009, 9:17 am, in reply to "What is a burst disc?"
173.3.80.224A burst disc is what you get from lugging doubles around. - Re: What is a burst disc?
Posted by Brian K
on 7/3/2009, 9:56 pm, in reply to "Re: What is a burst disc?"
67.76.99.221Ha Ha...Butler made a funny - that is a good one
Posted by bartman
on 7/3/2009, 10:58 am, in reply to "Re: What is a burst disc?"
Moonsnail Masterand so true lololol - Re: Is a single tank equipped with an H-Valve considered acceptable redundancy
Posted by Mo
on 7/2/2009, 3:36 pm, in reply to "Is a single tank equipped with an H-Valve considered acceptable redundancy"
151.198.127.161For those who don't know what an H-valve looks like:
If one reg begins a free flow I would hope that the diver is very flexible so that the one bad reg can be shut down. If not, what good is the second reg if it's attached to an out of air source????
The H-valve makes no sense to me.
- Re: Is a single tank equipped with an H-Valve considered acceptable redundancy
Posted by jmagilis
on 7/2/2009, 3:46 pm, in reply to "Re: Is a single tank equipped with an H-Valve considered acceptable redundancy"
71.230.196.78Two regulators connected to one tank is as redundant as two tanks connected to one regulator. Not really redundant at all. Two totally separate unrelated air supply systems is the only true redundancy. - Re: Is a single tank equipped with an H-Valve considered acceptable redundancy
Posted by John
on 7/2/2009, 10:44 pm, in reply to "Re: Is a single tank equipped with an H-Valve considered acceptable redundancy"
173.3.80.224I think that the greatest point of failure is by far the regulators. So IMHO 2 regulators on an h-valve is a pretty good way to go for dives where one tank makes sense. I have thought about it as a good way to alternate between doubles and a single tank without having to reconfigure hoses each time. But,I never got around to buying an h-valve and now I only have doubles so, no need. You could also carry a stage bottle with 50% in it which you could use at 70 feet. This could serve as further redundancy and as deco.
JPB
