looking for a valve fir a thermarest inflation bag

Discussion in 'DIY & MYOG' started by SafetyThird, May 23, 2020 at 2:34 PM.

  1. SafetyThird

    SafetyThird Section Hiker

    I have an inflation bag for my xtherm but all it has as a valve is a hole in bit of rubbery plastic.

    IMG_7110.jpeg

    this makes the bag useless as a dry bag unless I tape over it, which isn't a long term solution. Does anyone know of a closable valve I could glue into the bag that would fit over the end of a thermarest valve but still be able to be closed to allow a dry bag to be used and stay waterproof, that way the bag could do double duty.
  2. WilliamC

    WilliamC Thru Hiker

    The Thermarest Air Tap should work for you. I think they've been discontinued and are getting harder to find but there are still some around.
    I've got one around somewhere that I could POGO to you if I can find it, but it'll be quite a long wait.
  3. Mole

    Mole Thru Hiker

    I wouldn't bother as a drybag. If anything like the previous orange ones. Not very waterproof fabric, and once wet stays wet unless emptied out n dried.
  4. Robert P

    Robert P Trail Blazer

    The Vaude pump sack is an option as it has a cover for the valve connector, and could serve as a dry bag. I'm not convinced that it would have long-term durability for that purpose though. While I do use this to inflate my sleeping pads, it does seem a frustrating process, with the valve sometimes popping off the pump sack when under pressure, and the challenge of coordinating closure of the valve before pressure is lost, but that is always an issue with the Thermarest valves. I'm normally inflating the mat inside the tent so maybe the confined space makes this process more fiddly...
  5. WilliamC

    WilliamC Thru Hiker

    If you want to go a different route, the Exped Universal Valve Adaptor lets you use Exped inflation tools (Schnozzle, Pump Pilloe etc.) with Thermarest valves.
  6. Enzo

    Enzo Thru Hiker

    I've used one a few times as a dry bag, worked ok but then the pack is almost waterproof....
  7. Teepee

    Teepee Thru Hiker

    Mole likes this.
  8. Mole

    Mole Thru Hiker

    I'd put the pumpsack inside the bag! They really do soak up and hold water compared to any other drybag I've used.

    On a wet autumn NW Scotland trip (9days) a few years ago myself and a mate both used the pumpsack as a liner. Not serious leaking, just wetted out and held significant dampness against the contents. Never used it again in wet conditions.
    (I bought a speed valve Neoair next summer, removed the pumpbag problem and probably less than 25%inflation time and 5% of deflation time)
    Teepee and Enzo like this.
  9. gixer

    gixer Thru Hiker

    Used the exped Schnozzel with a pipe of tude as an adaptor the few times i've used my thermarest Xlite

    Schnozzel is waterproof but fragile, so it goes inside a pack liner
  10. Whiteburn

    Whiteburn Thru Hiker

    I use an 13L Exped Side Compression Bag as a pump sack, simply connected to the TAR with a short piece of corrugated plastic conduit. Bag it big enough to hold 250 quilt or PD400, down jacket & PJ's; it does take 6 or 7 squeezes to blow up a full sized TAR, weigh minus the compression straps ~60g & they have proved relatively robust lasting me 5 years (hundreds of nights use).

    Exped-Side-Compression-Bag-F1.jpg
    Last edited: May 24, 2020 at 12:29 PM
  11. SafetyThird

    SafetyThird Section Hiker

    Interesting options there, thanks everyone. Sounds like the bag isn't really cut out as a dry bag so if I go that route it would be to take a better dry bag like one of my exped ones and fit a valve to that. I have one of the thermarest battery pumps which is a great little gadget and doesn't weigh much more than large dry bag. I was thinking of a filling bag more as a backup or for longer trips if batteries might go flat. The air tap would be ideal to fit to a decent dry bag, weight almost nothing and be a good backup. @WilliamC if that offer stands then if you do eventually find it, I'd be very grateful, thank you.
  12. WilliamC

    WilliamC Thru Hiker

    I'll look out for it. I've just heard today that my niece's August wedding has been postponed so it's unlikely that I'll be back in the UK before winter, and that will depend on Covid conditions. It's small and light so I could put it in an envelope and post it from Turkey but the post office isn't accepting letters at the moment. That may well change in the next month or two, though.
    SafetyThird likes this.
  13. Enzo

    Enzo Thru Hiker

    I made a pumpsack a few years ago by siliconing a thin bit of I think wheelbarrow inner tube to a silnylon bag I sewed and sealed with silnet, used silnet to glue the rubber, it's still working. My drybag wasn't very waterproof but if you have a spare I don't see why you couldn't do the same.
    I've got a 36l alpkit one I use family camping to store excess stuff outside the tent I might have a go at. A simple plastic bung should be easy enough to find or make to keep the hole waterproof.
    SafetyThird likes this.
  14. Teepee

    Teepee Thru Hiker

    I made one from PU coated 2oz back in 2012 and it's still going strong. Flat felled seams, sealed with PU, nylon boning and a nozzle from a sealant gun.
    I carry my rolled up downmat in it.

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