Thanks for the tips for not create "negative pressure" in drybags,
assuming that I could find purge valves to purge the excess air from a
dry bag. I still would like to incorporate purge valves in my
homemade drybags.

End

"Scott Bemis" wrote in message
om...
Thanks for the tips for not create "negative pressure" in drybags,
assuming that I could find purge valves to purge the excess air from a
dry bag. I still would like to incorporate purge valves in my
homemade drybags.

End

Try a manufacturer of scuba diving drysuit valves, and use an automatic
cuff-dump valve. The Apeks ones are good, small and reliable, and easy to
install. Here is a source in theUK
http://www.divebooty.co.uk/equipment...ls.asp?pid=276 but for USA I'd
suggest trying rec.scuba.equipment and I'm sure they'll be able to help.

Cheers
David M

This is an excellent suggestion. I will be getting these apek valves
and installing them in homemade dry bags. As I kayak and do not scuba
dive, I was not aware of these type of valves. My drysuit for
kayaking does not have any valves, which is normal for kayak drysuits.
I am grateful for this suggestion.


Try a manufacturer of scuba diving drysuit valves, and use an automatic
cuff-dump valve. The Apeks ones are good, small and reliable, and easy to
install. Here is a source in theUK
http://www.divebooty.co.uk/equipment...ls.asp?pid=276 but for USA I'd
suggest trying rec.scuba.equipment and I'm sure they'll be able to help.

Cheers
David M

On 14-Oct-2003, (Scott Bemis) wrote:

This is an excellent suggestion. I will be getting these apek valves
and installing them in homemade dry bags.

Let us know what you think when you get them, please.

I have some valves like those used on flotation bags and they are almost
impossible to get. I received them as a result of a bulk purchase done
on the QajaqUSA web forum. The manufacturer couldn't tell where to get
them retail and only sold wholesale in lots of 1000. Big problem for us
DIY types.

Mike

"Michael Daly" wrote in message
ble.rogers.com...
On 14-Oct-2003, (Scott Bemis) wrote:

This is an excellent suggestion. I will be getting these apek valves
and installing them in homemade dry bags.

Let us know what you think when you get them, please.

I have some valves like those used on flotation bags and they are almost
impossible to get. I received them as a result of a bulk purchase done
on the QajaqUSA web forum. The manufacturer couldn't tell where to get
them retail and only sold wholesale in lots of 1000. Big problem for us
DIY types.

Having thought a bit more about this now, I think that on OPV/dump valve
(OPV=over pressure valve) for a scuba BCD (inflatable bouyancy vest) would
do this job even better. This is a spring loaded valve with a little knob
on a cord that you pull to open it. This way you only dump the amount of
air that you want to, rather than the valve deciding how much air to dump.
The other advantages are that they will be available from any dive shop, as
they are used by every diver on their BCD. If you don't know what to ask
for, ask for a "butt dump valve" and they'll know what it is. Probably $10
will get you one.

HTH
David M

"
I have some valves like those used on flotation bags and they are almost
impossible to get. I received them as a result of a bulk purchase done
on the QajaqUSA web forum. The manufacturer couldn't tell where to get
them retail and only sold wholesale in lots of 1000. Big problem for us
DIY types.

Mike

I do know if this is the same valve you use or not

At web url http://www.nrscatalog.com/product.asp?pfid=3875

Northwest River Supplies sells NRS Float Bag Valve

This may also be an option. I would just like to avoid an exhaust
tube as I would like to use these drybags in backpacking, sea
kayaking, and bicycle touring


Scott Bemis

On 15-Oct-2003, (Scott Bemis) wrote:

I do know if this is the same valve you use or not

At web url http://www.nrscatalog.com/product.asp?pfid=3875

Northwest River Supplies sells NRS Float Bag Valve

That's the one. I got 8 for $1, IIRC - shipping was negligible
since it was included with heat sealable fabric.

This may also be an option. I would just like to avoid an exhaust
tube as I would like to use these drybags in backpacking, sea
kayaking, and bicycle touring

I'm using them with short tubes and am planning to use a little
flap to tuck them in. For a tapered drybag, I'm just going
to put it on the end sticking out minimally.

BTW, the BCD valves release relatively easily. If you stuff
the drybag into a tight spot and the cord is slightly tugged in the
process, it will stay open. There's no mechanism for locking them.
There may be another type of valve, but I can't think of one. Those
and the drysuit valves are kinda big and likely a lot more than the
$0.30 for the NRS valve. A quick google scan on the drysuit valves
yields prices between $50 and $100!!

Mike

"Scott Bemis" wrote in message
om...
My drysuit for
kayaking does not have any valves, which is normal for kayak drysuits.

Yikes, I can't imagine kayaking where one needs a drysuit... Over here
(Western Australia) the water temp never gets below 14C or so

Cheers
David M