Cheap way to squeeze more gas out of bottles

[FIXXERVI6]

I don't have a booster so.....

Fill, cool, then fill back up, when the tank comes back up to room temperature you know have more PSI in your 40 then your higest pressured bank.

I squeezed in an extra 300 psi by doing this

- for when every PSI counts if I hand't done this I would had to have hauled an 80 to get my reserve on my deco up to proper volume.

Anyway I had my doubts on how well this would work and since it did the trick I figured I'd post it.

 

[do it easy]

Where do you put the beer when your bottle is in the ice?

 

[texdiveguy]

'Texas' style DIY......... ........ I still prefer an 80.

 

[FIXXERVI6]

'Texas' style DIY......... ........ I still prefer an 80.

I was boarder line needing that much gas for the current plan, 2600 in a 40 was cutting it too close for warm fuzzies, a full 40 gets my reserve up to 1.5x so makes me happy inside.

 

[FIXXERVI6]

Where do you put the beer when your bottle is in the ice?

Well at first I started pulling shelves out of the freezer and was going to stick it in the freezer, but if the wife caught me she'd have had a cow.

 

[do it easy]

What water temps do you dive in? Around here, below the thermocline, the temps are in the 40's, so as soon as you drop to depth, the gas is right back where you started. Not really, but the pressure would be about the same, so icing it up, would just get you back to even.

Of course, with O2, it might not be as bad since it would be used above the thermocline most of the year.

 

[texdiveguy]

I was boarder line needing that much gas for the current plan, 2600 in a 40 was cutting it too close for warm fuzzies, a full 40 gets my reserve up to 1.5x so makes me happy inside.

Cool.......hope your trek 'south' is safe and the dive/s are task effective.

 

[FIXXERVI6]

you get more volume of gas in it by doing this.

I filled it to roughly 2600 psi, that was a cool room temp (garage temp) 2600, iced it down for a few hours, pressure dropped a couple hundred psi, same volume of gas at room temp, lower PSI, I don't remember but that took it down to like 2350 or something like that, top it up again to 2600 psi, when the bottle warms back up it has like 2800 psi in it, thats more pressure then my highest bank pressure, ice it again, and repeat, in the end I end up with a 40 that has more pressure then my highest o2 bank cylinder has in it, even if I drop below a cold thermocline in the end I will have ended up with more gas in my 40.

 

[FIXXERVI6]

Cool.......hope your trek 'south' is safe and the dive/s are task effective.

We are down a diver (3 man team prefered for all "big" dives) so its cut back to a smaller dive, original called for two 80's we cut it back to two 40's, the dive is being limited by the amount of deco gas in the 40's.

 

[texdiveguy]

What water temps do you dive in? Around here, below the thermocline, the temps are in the 40's, so as soon as you drop to depth, the gas is right back where you started. Not really, but the pressure would be about the same, so icing it up, would just get you back to even.

Of course, with O2, it might not be as bad since it would be used above the thermocline most of the year.

At Travis/WP today ( per a fellow divers PM )above 80ffw it was in the low 80'sF....at 140ffw it was 78f---can you believe that ****--tropics.