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  1. rjack321

    Rebreather Went out of breath at the end of a dive with on a CCR

    Apologies I got you mixed up with the OP :D
  2. rjack321

    Rebreather Went out of breath at the end of a dive with on a CCR

    I seriously doubt this long after the dive anyone will be able to figure out if the airways were constricting due to asthma, or they were filling with fluid due to IPE, or a little bit of both. @Mod63 have you ever had exercise induced asthma before? Or had an asthma attack on a dive before...
  3. rjack321

    Question Apart from the purchase price, what are the ongoing maintenance and repair costs of your CCR (excluding consumables)?

    Random stuff will break or wear out over time. HUD goes bad, solenoid corrodes, puncture in a CL are all not cheap and also unpredictable. Same with proprietary Orings, some seem to last a decade, some a year.
  4. rjack321

    Question Valve for 100% O2 Deco Bottle

    Or it's all a marketing ploy and basically irrelevant compared to valve seat contamination via fills and grungy whips and DIN threads.
  5. rjack321

    Question What needle do I use to sew nylon webbing?

    The thickest strongest needle your machine will accept - and you still might break it, go slow. Also make sure you don't have any kind of cotton blend thread.
  6. rjack321

    Question The Right Dive Tanks: Autonomy vs. Tradition

    D12 = lp85 overfilled in Americanish
  7. rjack321

    A new normal...

    I have 3 times herniated a disk (2x in L4-5 and once in C4-5) surgery all three times for me. Have you consulted with a surgeon?
  8. rjack321

    Different entry technique with multiple travel gas / stage / deco cylinders

    Me too, but I'm also not standing alone, strapped into 80+kg of bottles, on a giant swim step, not even a rail to hold, while the boat rocks and motors around into position for me to drop. Forget it not safe. It's quite plausible to drop in 100s of meters up current of "the spot" and kit up in...
  9. rjack321

    Different entry technique with multiple travel gas / stage / deco cylinders

    Surface - you only have two hands. You don't want to be dealing with suit, power inflator, loop volume, watching your ppO2 and your buddies all potentially with a hand occupied on a scooter trigger. All of those bottles are negative and will sink into the abyss if you drop one.
  10. rjack321

    Different entry technique with multiple travel gas / stage / deco cylinders

    It's normal to pass down the extra cylinders after splashing. Then clip them in their respective places while in the water. Otherwise they can take on a trajectory of their own and wack you in bad places. Obviously 1x al40 is no big deal but 2x 80s and a 40 plus a scooter, camera and more is a...
  11. rjack321

    Question Valve for 100% O2 Deco Bottle

    Yes take reasonable measures and do your best. But agonizing over one itty bitty factor like thread pitch and not cleaning your stuff regularly is tangential. The problem is all the fluoro polymer materials (teflon and related analogues) which are potentially more O2 tolerant are too soft and...
  12. rjack321

    Question Valve for 100% O2 Deco Bottle

    There is no fire investigator ever capable of figuring the chrome vs unchromed question out. And combustible dirt/debris/aluminum oxide etc on a (combustible) nylon valve seat is going to exacerbate the potential for a fire. But figuring out all these factors after the fact is not possible for...
  13. rjack321

    Effect of Relative Humidity on compressors

    Correct what's left is 100% saturated and the amount of water it holds has nothing to do with outside humidity. It has everything to do with the temperature. On for instance a 25C day, the drains on a Key West compressor will vent more liquid than drains on a compressor in Phoenix. The amount...
  14. rjack321

    Question The Right Dive Tanks: Autonomy vs. Tradition

    1x D12 is fine for most single tank diving - which is generally shallow-ish, nobody is doing 35m+ in single around here. When sidemounted 2x D12 is realistic and ideal for colder water cave diving.
  15. rjack321

    Question Function dump valve drysuite

    If you stand vertically on the bottom, air will come out the shoulder valve or the neck seal (or both). No ballooning required. Everyone is entitled to an opinion, that doesn't make all of them correct.
  16. rjack321

    Question Valve for 100% O2 Deco Bottle

    More than one dive boat has gone up in flames *exactly* when a CCR's O2 bottle was opened. Would it have caught fire with a slower opening valve? Exactly how many fires? Nobody knows. It's oxygen, do your best to keep things clean and hope for the best, its inherently a wild card.
  17. rjack321

    Question Function dump valve drysuite

    The suit pressure is not evenly distributed "ambient" is not the same at your feet and your head (if you were standing for instance). If you drop your legs the water squeezes that gas towards your head - and it vents. If you roll your shoulder the valve is at the top and the water pushes the gas...
  18. rjack321

    Question Valve for 100% O2 Deco Bottle

    About 15 seconds after you open either package they won't be O2 clean anymore anyway. You can use either, just get them cleaned often-ish. (typically annually is good practice)
  19. rjack321

    Apart from a JJ CCR, what else do I need to order?

    Cause its already heavyyyyy. You don't need a SS plate at all.
  20. rjack321

    Cold water & wet suit

    The only source of heat is your body. Your body LOST heat to warm up that layer of water, it's never going to get that heat back. Your body will continue to try and keep that layer warm whether that energy is lost to flushing (really bad) or through the neoprene (slower than flushing but still...
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