Seaplane Outfitters Plugs are one way valves. No bending over to remove and replace during preflight float pumping. They will not come loose in rough water operations. Each valve allows air pressure to release through the one way plug to remain tight. 5.95/each They can be purchased from SEAPLANES NORTH LAKE HOOD (907-248-6161) or purchased online shipped priority mail.
https://Seaplaneoutfitters.com » 
