Why isn't there a tank valve-open marking?

[Patoux01]

Then you need to shield it from the sun, focus more, in short make it your business to see it.

I invite you to do the same test as I did, and tell yourself honestly "I can see this needle clearly moving down and up again when breathing the reg".

In my case, I was wondering if that test was yet another "do this, it works"-rumor, hence why I made the videos. I depress the purge button and the needle hardly moves a few bars, I doubt one draws more air by breathing than by purging, but I've been wrong before.

As to "make it your business to see it", yes, I've already solved the issue, I simply don't do that quarter turn back, my valves are either on or off, not "on but backed off a quarter turn" or "opened by half a turn" (as some do with manifolds "because then you don't have to do as many turns to close it when needed").

 

[RainPilot]

I've often had the spg needle move noticeably when the valve hasn't been open all the way (usually due to some twit fiddling after testing the regs*)

*- I am often that twit

 

[Diving Dubai]

AND: A question for those AI peeps. My old fashioned mechanical SPG needle swings real fast when I do a few test breaths. What happens if you are using a new fangled electrical AI system? Does it respond fast enough...

Just tested..

With Valve closed, it takes 2 breaths for computer to change initially then follows SPG. In my test SPG and Computer were reading 230 Bar, SPG went down Computer jumped to 70 bar then kept with SPG


I have SPG's rigged on all my 1st stages as a back up anyway and by habit check my SPG while breathing reg before entry. I see no reason to take an SPG off. Anyone who says it "to become more streamlined" is living in cloud cukoo land as 1 hose will not give you any noticeable drag

 

[Dan]

SPG is a must have for me, just in case my computer console runs out of battery in the middle of a diving trip. I made sure it stays on my chest as shown, above.

 

[divad]

What's the yellow fob for?

 

[Dan]

That's the Raja Ampat diving permit tag. You need to pay $100 to get the permit to dive there.

 

[Brad Roy]

Due to the occasional apparent confusion about which way to turn tank air valves to open them, and the possibility of air being turned off by inept dive boat crew, etc, why isn't there some universal labeling standard to show which way to turn a valve on?

It would seem relatively simple to have an arrow molded into all valve handles, and the arrow points in the direction of Open / On.

This way even if for some reason a valve is breaking the standard CCW-open method, it's obvious just by looking at the arrow direction what needs to be done.

Try this
https://www.amazon.com/Vindicator-Visual-Indicator-Scuba-Cylinder/dp/B00COC4C6A

 

[Dan]

Try this
https://www.amazon.com/Vindicator-Visual-Indicator-Scuba-Cylinder/dp/B00COC4C6A

It's already discussed in page 1.

 

[Brad Roy]

It's already discussed in page 1.

Good thing you pointed that out. Read your own signature line.

 

[Dan]

Yes. I have that problem. That's why I put there to constantly remind myself to think positive.