Double Tank Manifolds, Bad Idea!

[rhwestfall]

ding ding ding, and thats the end of the 9th round (okay, pages). Lets go to the judges....

judge Smith has it 10-10
judge Jones has it 10-8
judge Homes has it 8-10

okay, who is going to land the winning punch????

(good god we need the "popcorn" icon here....)

 

[nimoh]

ding ding ding, and thats the end of the 9th round (okay, pages). Lets go to the judges....

judge Smith has it 10-10
judge Jones has it 10-8
judge Homes has it 8-10

okay, who is going to land the winning punch????

(good god we need the "popcorn" icon here....)

I don't consider this thread to be a fight, although I'm sure some disagree.

I was taught in manifolded doubles, appreciate the advantages, accept the disadvantages, and continue to dive them. However, I am genuinely interested in other perspectives that may ultimately result in changing my gear configuration...for the better. So far, I am sticking with my manifolded doubles, but I don't see them as far superior, just a little better for me at this time.

 

[Tortuga68]

Might be worth noting that in the time it takes to close the isolator, the diver is losing gas from both sides which is not the case with ID

I really don't get this; you're losing gas either way until a valve is closed

 

[nimoh]

I really don't get this; you're losing gas either way until a valve is closed

if you have an inboard leak on your left tank with manifolded doubles, you are losing gas from both tanks until you close the isolator, then you will continue to lose gas from your left tank.

if you have an inboard leak on your left tank with independent doubles, you will lose all of the gas from your left tank (and none from the right)

 

[rhwestfall]

I don't consider this thread to be a fight, although I'm sure some disagree.

I was taught in manifolded doubles, appreciate the advantages, accept the disadvantages, and continue to dive them. However, I am genuinely interested in other perspectives that may ultimately result in changing my gear configuration...for the better. So far, I am sticking with my manifolded doubles, but I don't see them as far superior, just a little better for me at this time.

It seemed (to me) "better" than asking if we can just agree to disagree...........

these two approaches have benefits and limitations that need to be evaluated by the user. One can clearly never "win" this discussion.....

 

[nimoh]

It seemed (to me) "better" than asking if we can just agree to disagree...........

these two approaches have benefits and limitations that need to be evaluated by the user. One can clearly never "win" this discussion.....

I agree that the argument of which method is "better" is unwinnable, however the discussion of the advantages and disadvantages is interesting

 

[ajduplessis]

Might be worth noting that in the time it takes to close the isolator, the diver is losing gas from both sides which is not the case with ID.

Closing the isolator takes less than 2 seconds and this includes reaction time. You only open the isolator 1/4 turn pre-dive, no need to open them the entire way!!!! The cylinders stay in equalibrium only slightly open.

I dont know why some divers open the isolator fully, its not needed.

 

[Rich Keller]

I see nothing wrong with having two tanks in a double backpack that each have their own reg and are not connected by a manifold. One advantage is that you turn them both on at the start of the dive and never have to reach back to the valves again. Another advantage is the equipment is more versatile so you are not spending extra money on additional tanks that would be dedicated to the doubles set only. Both ways have their pluses and minuses but none are so significant that they should make a big difference. This is just an updated "old school" idea that adds another reg rather then using a removable manifold to connect 2 single tanks.

 

[Slamfire]

nevermind.

 

[AfterDark]

I see nothing wrong with having two tanks in a double backpack that each have their own reg and are not connected by a manifold. One advantage is that you turn them both on at the start of the dive and never have to reach back to the valves again. Another advantage is the equipment is more versatile so you are not spending extra money on additional tanks that would be dedicated to the doubles set only. Both ways have their pluses and minuses but none are so significant that they should make a big difference. This is just an updated "old school" idea that adds another reg rather then using a removable manifold to connect 2 single tanks.

Also for divers like me that have had several rotator cuff ops and can't get to MD valves the IDs or just the thing. After all how good are MD's if the diver can't reach the valves during the dive? I guess I'll never be a real diver.