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Would a p-trap arrangement with a one way valve to dump the water out the
bottom work?
When you submerge, the water pressure would keep the valve closed, and when
you surface, the weight of the water inside the snorkel would open the valve and
let the water out.
A light spring would keep the valve closed when you have the motor off and
begin to submerge, while a poppet valve at the top of the snorkel would keep
most of the water out. Then, when you come up, any water in the trap would leak
out through the trap valve. Frank D. AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. |