Fitting a valve to a drybag

Make your own gear? Talk about it here!

Moderators: Bearbonesnorm, Taylor, Chew

Post Reply
User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Fitting a valve to a drybag

Post by gecko76 »

Sorry if this has been done before, but stuffing a sleeping bag into a handlebar drybag, how do you not trap air? I'm thinking of fitting a one way valve, perhaps similar to that on my Vango aotrom mat (recommended btw), to let air out but keep water out.

Easily done? Any suggestions?
Do what you can, with what you've got, where you are.
Dean
Posts: 157
Joined: Thu Sep 12, 2019 9:03 am

Re: Fitting a valve to a drybag

Post by Dean »

My sleeping bag has its own cylindrical dry bag, which is 5mm narrower in diameter than my handlebar drybag. Slides straight in and leaves much more room for other items than if it was stuffed by itself.
redefined_cycles
Posts: 9140
Joined: Tue Sep 20, 2016 8:19 am
Location: Dewsbury, West Yorkshire

Re: Fitting a valve to a drybag

Post by redefined_cycles »

I think its the sea to summit range that have the base made of eVent. So after stuffing it you can squish the air out of the waterproof but air permeable material. Takes a bit of orientation of how you hold the bag so the air can escape from the bottom. But I find it to work well and I now how 2 bags...
ripio
Posts: 198
Joined: Fri Jul 14, 2017 9:12 am

Re: Fitting a valve to a drybag

Post by ripio »

gecko76 wrote: Thu Mar 23, 2023 9:52 pm Sorry if this has been done before, but stuffing a sleeping bag into a handlebar drybag, how do you not trap air? I'm thinking of fitting a one way valve, perhaps similar to that on my Vango aotrom mat (recommended btw), to let air out but keep water out.

Easily done? Any suggestions?
Just squeeze the air out by starting to roll the bag at the same time as compressing it, been doing it that way for years with no valve, no problem.
User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Re: Fitting a valve to a drybag

Post by gecko76 »

It's probably not as much of a problem as I'm making out, just a frustration really. The drybag is a podsacs one from Planet-X and impressively tough. The winter bag is a Rab 700 Ascent and very warm, and it does fit, just.
Image
The trick is getting the drybag to roll down as much as possible to fit between the drop bars, otherwise changing gear becomes tricky. If I can get all the air out it's fine but can only seem to manage that with a bare arm and careful stuffing, which is OK at home but not so much on a cold morning in the woods. I've always avoided rolling sleeping bags because it can stress the stitching.

A simple valve would make it easier and quicker to stuff, but it's probably not really an issue. My original thought was a presta valve, but that would be vulnerable to knocks.
Do what you can, with what you've got, where you are.
ripio
Posts: 198
Joined: Fri Jul 14, 2017 9:12 am

Re: Fitting a valve to a drybag

Post by ripio »

Just start the roll of the closure, say one turn, then with the bag upright, lean your weight on the top and you will find the air will be forced out. Once it's compressed, quickly pull up on the closure buckles and roll down a couple more turns.
User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Re: Fitting a valve to a drybag

Post by gecko76 »

Yeah it might just be a matter of technique. Problem of the down compressing and trapping air can probably be sorted by going slower, but a valve would make it better. This looks ideal, but they don't ship to the UK.
https://www.adventurexpert.com/product/ ... tpu-valve/
Do what you can, with what you've got, where you are.
User avatar
dlovett
Posts: 1924
Joined: Sat Nov 08, 2014 6:37 pm
Location: South Coast
Contact:

Re: Fitting a valve to a drybag

Post by dlovett »

gecko76 wrote: Thu Mar 23, 2023 9:52 pm Sorry if this has been done before, but stuffing a sleeping bag into a handlebar drybag, how do you not trap air? I'm thinking of fitting a one way valve, perhaps similar to that on my Vango aotrom mat (recommended btw), to let air out but keep water out.

Easily done? Any suggestions?
Hey Gecko,

Perhaps these would do the trick?

One-way Degassing PE Valve 33p each.
https://www.ebay.co.uk/itm/114316610786 ... lnEALw_wcB
User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Re: Fitting a valve to a drybag

Post by gecko76 »

Thanks. I did wonder about those. Not sure of the best way to fit one but will order a few and have a think.
Do what you can, with what you've got, where you are.
belugabob
Posts: 601
Joined: Mon Jun 01, 2015 8:20 pm

Re: Fitting a valve to a drybag

Post by belugabob »

ripio wrote: Sun Mar 26, 2023 1:26 am Just start the roll of the closure, say one turn, then with the bag upright, lean your weight on the top and you will find the air will be forced out. Once it's compressed, quickly pull up on the closure buckles and roll down a couple more turns.
This ^^^

My riding buddy saw me do that, on a trip, and swore - because it hadn't occurred to him, before.
User avatar
Cheeky Monkey
Posts: 3915
Joined: Mon Aug 01, 2011 1:48 pm
Location: Leeds ish
Contact:

Re: Fitting a valve to a drybag

Post by Cheeky Monkey »

Shaff's suggestion of the event-ended stuff sacs by Sea 2 Summit is a good one, IMO. They sold loads off in the old whitey-grey / yellow colour scheme but seem to have refreshed the colour schemes:

https://www.seatosummit.co.uk/products/ ... c-dry-bag/

Nae cheap but effective and you don't end up with a valve, which just seems like an unnecessary encumbrance. Then again I get the impression you quite want to fit something so, if that's the case, have fun and post the results :grin:
User avatar
Cheeky Monkey
Posts: 3915
Joined: Mon Aug 01, 2011 1:48 pm
Location: Leeds ish
Contact:

Re: Fitting a valve to a drybag

Post by Cheeky Monkey »

User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Re: Fitting a valve to a drybag

Post by gecko76 »

Success, after a fashion. Emailed adventureexpert.com and got a speedy reply from Kajo in Slovenia confirming no UK sales but suggesting Etsy (no joy) and ebay (neither), so decided to take a punt on one of these, which turned out to be massive
Image
but after a bit of work with a Swiss army knife and the addition of a couple of those valves pointed out by dlovett
Image
then a bit more cutting
Image
and finally a bit of stormsure to make sure
Image
it works quite nicely. You can hear the air being squeezed out of the bottom, but it should keep any water out. Overall pleased, though I'm still surprised those valves aren't more widely available. I think Silva use them on their bags.
Do what you can, with what you've got, where you are.
User avatar
ootini
Posts: 1798
Joined: Tue Mar 24, 2015 5:45 pm

Re: Fitting a valve to a drybag

Post by ootini »

If you're ever looking for a valve again, try looking for a scuba diving shop / dry suit shop... a cuff dump or shoulder dump would do what you're after.
User avatar
gecko76
Posts: 171
Joined: Mon Sep 19, 2022 4:59 pm

Re: Fitting a valve to a drybag

Post by gecko76 »

Ah, good to know, thanks.
Do what you can, with what you've got, where you are.
Post Reply