+ Reply to Thread
Results 1 to 6 of 6

Thread: Routing for Helium misers

  1. #1
    Nicholas Smith Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo has a reputation beyond repute Abbo's Avatar
    Join Date
    Aug 2006
    Location
    Tokyo
    Posts
    673
    Megalodon

    Routing for Helium misers

    At the moment I use air dil on shallower dives down to 50m, but I want to start using 17/30 instead - because I can. Over a weekend diving I typically need the diluent topping up, and I couldn't get it filled in the field with trimix. What I therefore want to do is put air in the bail-out tank and 17/30 in the on-board. Then I could use air from the bail-out to run the wings. Does anyone do this? Does it make any sense, or am I merely adding extra risk? HOW DO YOU DO THE ROUTING TO MAKE SURE THE GASES ARE KEPT SEPERATE?

    At the moment, I have a pretty common set-up: I have a hose going from my on-board diluent gas to a manifold; 3 hoses come off the manifold to the 'breather, the BOV and the wings. I have connected a hose from my bail-out gas, via a quick disconnect, to the manifold.

  2. #2
    Diving Technologist JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba has a brilliant future JS1scuba's Avatar
    Join Date
    Oct 2005
    Location
    Lake Havasu City, AZ - USA
    Posts
    692
    KISS Classic # 275

    MK15, Draeger, TheKyle-CCR

    Re: Routing for Helium misers

    Quote Originally Posted by Abbo  View Original Post
    At the moment I use air dil on shallower dives down to 50m, but I want to start using 17/30 instead - because I can. Over a weekend diving I typically need the diluent topping up, and I couldn't get it filled in the field with trimix. What I therefore want to do is put air in the bail-out tank and 17/30 in the on-board. Then I could use air from the bail-out to run the wings. Does anyone do this? Does it make any sense, or am I merely adding extra risk? HOW DO YOU DO THE ROUTING TO MAKE SURE THE GASES ARE KEPT SEPERATE?

    At the moment, I have a pretty common set-up: I have a hose going from my on-board diluent gas to a manifold; 3 hoses come off the manifold to the 'breather, the BOV and the wings. I have connected a hose from my bail-out gas, via a quick disconnect, to the manifold.

    I drive my dry-suit off my off-board bail out. You can do your wing as well though it becomes convoluted should you need to drop the off-board bottle.

    What you might want to consider doing is getting some additonal bottles for your unit with Dil in them OR put your 17/30 in larger tank and transfil to your smaller bottles as needed.

    Cheers

  3. #3
    Richie Burr diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb has much to be proud of diverreb's Avatar
    Join Date
    Mar 2007
    Location
    Dover, DE
    Posts
    1,487
    O2ptima FX

    Re: Routing for Helium misers

    A lot of us use a separate 6 CF bottle for Wing or Dry Suit inflation...

    There are lots of places to attach the bottle. There are small inexpensive first stages and all you need is an OP button valve, single inflator hose, and a small button pressure gauge. Works very well....

    Then keep an inflator hose on your Bail Out, if for some reason you loose or run out of gas in the small bottle, you won't be screwed.

    Richie

  4. #4
    RBW Member HaisaiMatt is on a distinguished road HaisaiMatt is on a distinguished road HaisaiMatt's Avatar
    Join Date
    May 2007
    Location
    San Diego
    Posts
    128
    MK15.5, rEvo, Sentinel, LarV

    Optima, MK15

    Re: Routing for Helium misers

    I see two approaches, one is to use a dedicated bottle for drysuit and wing inflation, and the other is to use the bailout bottle. I try to do at least one dive each week deeper than 200 feet, and I have always used my offboard bailout for my drysuit. In my opinion, adding another bottle is not necessary, adds unneeded failure points, and is one more thing to get snagged in a wreck, line, or kelp.

    Another consideration you may want to take into account is the head spin you may get if you switched to air from mix at 50 meters. Just remember if you're bailing out, you will be task saturated and are going to want to be able to think clearly. I find it worse switching from a shallower EAD to a deeper one than had I just been on the leaner gas the entire dive.

    Of course only you know how you will react, and I am sure you can make the right choices for yourself, I just wanted to give you some input from my experiences.

    Richie has the BOV hose routing setup down to a science, and he was kind enough to email me pictures which I think may be posted on the site.

    Matt

  5. #5
    So many CCR So little etc Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase's Avatar
    Join Date
    Jan 2005
    Location
    Kent
    Posts
    5,205
    JJ Hybrid

    Inspo, Hammer Head, KISS rEvo

    Re: Routing for Helium misers

    I run 3ltr tins on the inspo and KISS and I use typically 50-80 bar of diluent on a dive giving me two dives on a 230bar fill.

    I run suit inflate off a 1.5ltr bottle which doubles as gas for lift bags. I have a redundant suit/ wing hose on my bailout for the problem days but i don't use it. Its a pain if you keep nicking the tops off your bailout for wing or suit inflate. Sooner or later you end up jumping in with less than optimal bailout gas.

    If I wanted to save mix Id run the wing off the 1.5ltr suit bottle and my suit off the bailout. Seeing as I use wing for buoyancy it eats the most gas. I have toyed with running the wing of the 1.5 and using the little 0.8 tanks I have for running the suit but with 3ltrs of 18/45 costing me about £5 I cant really be bothered.


    What ever you do just don't run all your buoyancy off a single gas source.


    ATB

    Mark

  6. #6
    Prism 'prentice Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike is a splendid one to behold Mike's Avatar
    Join Date
    Feb 2005
    Location
    Melbourne
    Posts
    458
    Prism

    Re: Routing for Helium misers

    Run your wing on O2. It's cheaper than mix, and if you use an air 2 it gives you OC access to O2

    Mike

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts