I am planning to make many small dry bags - to use for kayaking,
backpacking, and bicycle touring. I would like to add purge valves to
these homemade dry bags. I cannot yet find a place that sells purge
valves that I can use with dry bags. I am looking for something
similar to the Autopurge (tm) valve as offered in Seattle Sports bags.

Any information on where to purchase purge valves would be
appreciated.

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