tank-to-tank transfers

[Crush]

I dive with a pony bottle (19 cu ft). I routinely practice with it, and find that (unsurprisingly) the pressure drops with use. How can I top up the pony bottle between dives? I was thinking of doing a (main) tank to (pony) tank transfer - all that I would need would be a hose, two adapters (both yoke), and a pressure-relief valve. Is there anything like this on the market, prefabricated? If not, where would you find the parts?

Thanks

 

[Tortuga68]

http://www.scubaboard.com/forums/tanks-valves-bands/19252-transfill-whip.html

 

[ianr33]

This is a good deal
Tank to Tank Equalizer With Gauge reviews and discounts, IST

 

[spectrum]

This is a good deal
Tank to Tank Equalizer With Gauge reviews and discounts, IST

That is a wicked good deal and they have the DIN version for only $5 more!

Pete

 

[Crush]

This is a good deal
Tank to Tank Equalizer With Gauge reviews and discounts, IST

I just ordered it, ianr33 - thanks.

 

[Couv]

Save your money and make one for a few dollars. Here are a couple of links that describes how to use two regulators and your SPG hose.

http://www.scubaboard.com/forums/5054069-post54.html
http://www.scubaboard.com/forums/5049219-post51.html

 

[ianr33]

And how long does it take to equalize through the pinhole size hole in a HP hose ?

(An Al 80 takes around 20 minutes to empty from a cut HP hose)

 

[veriqster]

And how long does it take to equalize through the pinhole size hole in a HP hose ?

(An Al 80 takes around 20 minutes to empty from a cut HP hose)

not sure how fast you want to fill it or how fast it's recommended to fill it but that's about the time a small compressor would fill it in.
he says "refilling" so I assume it's in between dives which means connect and enjoy your surface interval, it's not a time sensitive or life threatening situation, plus, if you transfill often in between tanks you would have a cascade, compressor, ...; making the din to din whip not that useful.
p.s. if you need faster transfills just stop by your local hydrolic store, they got almost everything one could imagine.

 

[Couv]

And how long does it take to equalize through the pinhole size hole in a HP hose ?

(An Al 80 takes around 20 minutes to empty from a cut HP hose)

I have not timed it, but I would estimate about 10 min. The beauty of it is that you can just carry a small fitting in your save-a-dive kit and either top up a pony or just add a small spurt of gas so you don't have to argue with the vip nazies.