Question What is that valve on that tank?

[Mobulai]

while window-shopping on ebay for BA/109s I came across this peculiar listing; it’s a Mark X BA (150), Mk10… relatively known; but there was this tank.. with an A Clamp on it, no not a yoke valve, a clamp, like on a reg

What in the world is that, and why?

Also, the mk10 had this wired fitting coming out of an LP port, seems that it goes into the tank.

How would that work even, connecting an LP port to the HP of the tank?

 

[Kinglake]

Pretty sure that is a Spare Air tank with the refill adapter on it that lets you fill it off a normal scuba tank.

 

[MarkA]

while window-shopping on ebay for BA/109s I came across this peculiar listing; it’s a Mark X BA (150), Mk10… relatively known; but there was this tank.. with an A Clamp on it, no not a yoke valve, a clamp, like on a reg
View attachment 858216View attachment 858215

What in the world is that, and why?

Also, the mk10 had this wired fitting coming out of an LP port, seems that it goes into the tank.View attachment 858217

How would that work even, connecting an LP port to the HP of the tank?

Except for the regulator. I have had all of the items in the photo.

BSAC 88 tables level 1
BSAC/RNPL tables (Used up to 1988)
The small cylinder is used on an AP Valves BC for emergency inflation. It is filled from the main cylinder. The button is a purge button used once the cylinder valves are closed. If you look on their web site you will see they are still sold.
The tap you show on the end of a hose is a BC inflator from AP Valves

This looks typical of a UK diver from about 1990.

 

[MarkA]

Pretty sure that is a Spare Air tank with the refill adapter on it that lets you fill it off a normal scuba tank.

No. It's an emergency cylinder from AP Valves.

 

[Mobulai]

Very interesting stuff (still breaking my brain tho) — and the seller is from UK indeed

Thanks

 

[MarkA]

Very interesting stuff (still breaking my brain tho) — and the seller is from UK indeed

Thanks

It comes from the early days of horse collar type BC's, when direct feeds were not common. Fenzy is a good example

Fenzy Horsecollar bcd - Vintage Scuba Gear Australia

The Fenzy featured a built-in air bottle that inflated the vest by simply turning on the valve

www.vintagescubagear.com.au

 

[Mobulai]

It comes from the early days of horse collar type BC's, when direct feeds were not common. Fenzy is a good example

Fenzy Horsecollar bcd - Vintage Scuba Gear Australia

The Fenzy featured a built-in air bottle that inflated the vest by simply turning on the valve

www.vintagescubagear.com.au

Oh now I can understand how the whole thing comes together… so this would be a dedicated BC tank more or less

 

[MarkA]

Oh now I can understand how the whole thing comes together… so this would be a dedicated BC tank more or less

Yes, normally about 0.4l. That one in the photo looks aluminium while the one on the Fenzy is steel.

 

[LI-er]

A BCD emergency inflate cylinder sounds like a great tool to turn a diver into a surface-seeking guided missle.

 

[Mobulai]

weren't they known as suicide bottels or something like that?