:And in case any other person is looking at making drybags with air
release valves (and to save time)

I am also looking at the valves at

www.shipstore.com/SS/HTML/SEV/SEVTVL.html,

a clear valve base with push-in type plug.
These valves are much less expensive than the the BCD type valves. On
smaller drybags in stuffed in a kayak or bicycle pannier or BOB (tm)
trailer, a less durable and less expensive valve may work.

I did stop at a local scuba shop and purchased one BCD dump valve/over
pressure valve ($US 12). It will be installed on a larger backpack
style drybag (70 liter or 110 liter in size and used when canoe
camping in the Boundary Waters Canoe Wilderness Area). This large
drybag gets more abuse than drybags stuffed in a kayak. I have a few
other, larger canoe drybags that will get this more expensive BCD type
valve. I will also shorten the string and not put on the plastic pull
tab - to prevent accidentally release.

>>
> The valve at NRS Float Bag Valve
> http://www.nrscatalog.com/product.asp?pfid=3875 is most likely the
> lowest cost, although I doubt I could get your price of 8 for $1.00
>
> > Those 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!!
>
> And yes, the drysuit dump cuff valves are relatively expensive.
> The Apeks Drysuit Cuff dump is as of October 16, 2003 11.75 GBP
> (United Kingdom Pounds) or about US $20, shipping not included as
> listed
> at http://www.divebooty.co.uk/equipment_details.asp?pid=276,
> Description:
> Totally free from maintenance and requires no adjustment. Designed to
> > There may be another type of valve, but I can't think of one. Those
>
>
> And I strongly prefer to avoid pulling out a damp or wet sleeping bag
> along with damp or wet clothing out of a drybag with a OPV or purge
> valve that released.
>
> At www.gmcscuba.com (Global MFG. Corpo, 1829 S. 68 Street, West Allis,
> Wisconsin 53214, U.S.A. in my part of the world, makes a purge valve
> for lift bags. It is listed on page 7 on their online catalog, in the
> communication products and support gear section, item number 57030
> Purge valve Purge Valve for Lift Bags. These are sold at local
> scuba shops in the Minneapolis, Minnesota, U.S.A. area. I will look
> at these valves.
>
> At www.underwaterfloation.com/drybags.htm, there are Prolift over
> pressure valves used in liftbags. Prolift Over Pressure Valves are
> available in 2 styles. The two piece black screw type is used on our
> smaller liftbags and requires no special tooling for installation.
> The large white PVC Valve is used on larger liftbags and requires a 1
> 1/2" flange to be installed.
> OPVBLK - Over Pressure Valve Black $9.00
> OPVWHT - Over Pressure Valve White $12.00
> And liftbags could make the world's largest sponsons, making a kayak
> unsinkable (just kidding .
>
> I assume these purge and over pressure valves are similar to BCD
> valves, although I do not have a BCD (just a simple kayaker, no scuba
> experience).
>
>
> I have spent far more time looking at valves than I initially planned
> (and looking at scuba related gear in the process).
>
> Scott