AL Twins vs Stage

[JohnN]

What AL100s are you using? They are incredibly buoyant. At least a couple of pounds when low.

AL100's are 100ft^3 at 3300 psi. Many LOB's are only going to deliver 3000 psi so derate that capacity by ~10%

A whole lot of bulk for minimal gain

 

[Nick_Radov]

P.S.: Reducing gas consumption and changing backplate are not options at this time.

Why not? Aluminum backplates are cheap and readily available.

 

[Searcaigh]

What AL100s are you using? They are incredibly buoyant. At least a couple of pounds when low.

I don't have any, but I did own one in the past and I didn't need any weights when using it, and it certainly wasn't steel. It was also rated at 230 bar.

I sold it to a buddy of mine who subsequently shipped it to the UK when he returned there and to his dismay no dive shop there will fill it as it doesn't comply with UK regulations.

 

[grantmac]

AL80 twins are a fine setup in warm water

 

[David Novo]

Why not? Aluminum backplates are cheap and readily available.

I would have to order it online which does not work with my departure date.

 

[jale]

But, I invented a device called the DTA Double Tank Adapter that allows any backplate to use independent backmount doubles.

"Invented"
I used to use one like this many years ago and I got the idea from a fellow diver.
You can even make it more travel friendly by splitting in two parts
Further more, on your side of the pool, I think Dive Rite was selling one like this ages ago.
In Europe, you can find a similar system easily. Indeed quite a lot of divers use a jacket bcd style with a double tank and these kind of systems are popular.

 

[MarkA]

"Invented"
I used to use one like this many years ago and I got the idea from a fellow diver.
You can even make it more travel friendly by splitting in two parts
Further more, on your side of the pool, I think Dive Rite was selling one like this ages ago.
In Europe, you can find a similar system easily. Indeed quite a lot of divers use a jacket bcd style with a double tank and these kind of systems are popular.

like this from a company in Cornwall


And the metal stuff from a company in Kent

 

[Scared Silly]

I regularly dive twin steels at home with a drysuit and I am considering the following options (not as redundancy but as added gas):
1) AL twin set (11.1L x 2);

I will be diving a steel backplate (the only I have) plus potentially weight on a belt (2 kg in option 1, option 2 still have to calculate) and a 3 mm full wetsuit with 5 mm boots.

When diving in Truk Lagoon that is SOP for twins. Works quite well.

 

[Umuntu]

like this from a company in Cornwall


And the metal stuff from a company in Kent

No need to not mention AP Diving and Kent Tooling. They make excellent products.

 

[divezonescuba]

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