Doubles configuration

[OneBrightGator]

Mike, drop The Kraken a PM. He's in your area and should be able to help out with any diving questions you have, DIR or otherwise

 

[mikerault]

Thanks!

Now, what is preferred for the nuts holding the wing and or tank bands to the backplate? Wing nuts or (as I have seen on some) the hex head socket type? Should the nuts be toward the diver or toward the tanks?

Mike

 

[MSilvia]

Now, what is preferred for the nuts holding the wing and or tank bands to the backplate? Wing nuts or (as I have seen on some) the hex head socket type? Should the nuts be toward the diver or toward the tanks?

I used to use stainless steel butterfly thumb screws, but I've since switched to the delrin backplate thumbwheels made by Deep Sea Supply. They're pretty flat, easy and comfortable to turn, hold securely, don't corrode in seawater, and don't seize or strip bolts if cross-threaded.

 

[rjack321]

The button type nuts (where the end of the bolt can't stick through the nut) are not recommended. Different plates will have different angles of bend to them. So the plate might be a little more down in the V or a little higher. If you loan the tanks or borrow a plate or basically change anything the button nuts may or may not work.

So wing nuts or the delrin nuts are a better option. Regardless of which you use, get a wing nut as a spare for your save a dive kit.

 

[mikerault]

Will do, thanks! Knowing me, I'll get a sack ful to put in the kit...

SHowing more ignorance here, but, if for some reason you have to isolate the side where the pressure gage is located, will it still indicate the pressure from the non-isolated tank (assuming you didn't close the cross connect?) If I had my setup here I would just do it and test it out, but Diverite is taking their own sweet time getting the manifold to the LDS...

Mike

 

[cerich]

Will do, thanks! Knowing me, I'll get a sack ful to put in the kit...

SHowing more ignorance here, but, if for some reason you have to isolate the side where the pressure gage is located, will it still indicate the pressure from the non-isolated tank (assuming you didn't close the cross connect?) If I had my setup here I would just do it and test it out, but Diverite is taking their own sweet time getting the manifold to the LDS...

Mike

Hey Mike,

I did the first day of a Intro to tech course last week. We are doing an equipment configuration night over the next couple of weeks as soon as all the gear the students ordered shows up (no sense till then)

You are welcome to come by and see/learn what is done and why. No charge! (unless you want to jointhe course, then you'll have to pay, normal price but we would have one day to make up. We are diving the weekend of Jan 6th. in North /Central Florida

I'm a NAUI Tech Instr also GUE Cave 1 certified.

PM me if interested.

 

[rjack321]

You always fill and dive doubles with the isolator open. You do not want any chance of getting different mixes in there.

That said, Isolator closed = no gauge reading for the right tank.

However, you know your consumption, time and depth and could estimate it if necessary. But if you had to close the isolator during a dive you are exiting.

Many of us would share gas with our buddy and "save" the right tank for contingencies where sharing gas is more difficult, and of course you are using the right tank for bouyancy.

Will do, thanks! Knowing me, I'll get a sack ful to put in the kit...

SHowing more ignorance here, but, if for some reason you have to isolate the side where the pressure gage is located, will it still indicate the pressure from the non-isolated tank (assuming you didn't close the cross connect?) If I had my setup here I would just do it and test it out, but Diverite is taking their own sweet time getting the manifold to the LDS...

Mike

 

[KMD]

SHowing more ignorance here, but, if for some reason you have to isolate the side where the pressure gage is located, will it still indicate the pressure from the non-isolated tank (assuming you didn't close the cross connect?) If I had my setup here I would just do it and test it out, but Diverite is taking their own sweet time getting the manifold to the LDS...

I think he was asking what happens when you close the tank valve.

Closing a tank valve shuts off the gas supply to the 1st stage but still allows the gas to be used by the other 1st stage.

So if I close my right post valve - My primary reg no longer delivers gas and I can't inflate my wing, but my backup reg can use the gas from both tanks and my pressure gauge indicates the correct pressure of both tanks.

If I close my left post valve - My backup reg no longer delivers gas, I can't inflate my drysuit and my pressue gauge does NOT indicate the correct pressure of either tank. My primary reg can use the gas from both tanks.

 

[cerich]

Many of us would share gas with our buddy and "save" the right tank for contingencies where sharing gas is more difficult, and of course you are using the right tank for bouyancy.

Why? So both of you can be exposed to more risk? You isolate, you thumb, no if's or buts.

If you've been diving a conservative gas management plan you have enough gas to exit without going on your buddies long hose. Obviously you place the distress diver in the best position for the team and "close ranks". Going to your buddies long hose when you still have gas truly makes egress more difficult and places more divers at risk.

By the right tank for buoyancy I assume you are talking about the reg on the right post has the LP inflator hose coming off it. Only when wet would that be your only bouyancy, left post of argon bottle supply the drysuit.

 

[mikerault]

SO is Argon used on the wing or just for the dry suit (when used?)

I may try to swing by for the gear config night. Let me know. Most of next week I will be in Southern California. Of course my doubles won't be ready until next week (Monday at the earliest) anyway. Will you be doing the webbing/backplate or just doubles and regulator setups?

Kraken and I dive together all the time, I am getting my SS backplate from him.

Mike