I am looking for purge valves. I am planning to make my own various size dry bags this winter. I would like to install purge valves in these homemade dry bags. The type of valve that I am interested in is listed at the options URL. Cascade Designs uses a purge valve in some of their dry bags. Seattle Sports also offers a AutoPurge (tm) valve in their dry bags.
I am interested in the valves. I want to make many various size dry bags, for kayaking, bicycle touring, and backpacking.

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