We'll have to track ours down. Is it possible that some boats don't have a vent? When we fill our tanks we get big "thunk" sounds as they fill. When you pull the hose out of the deck fitting, you usually get a big geyser shooting out of it. I'm assuming the sounds are just due to the weight of the water pushing on the tank, but I'm not sure about the geyser...
s/v "Pelican" Passport 40 #076- Finished Cruising - for the moment -
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"Don't dream your life, live your dream" - Bob Bitchin'
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