Quote:
Originally Posted by makobuilders
That seems like a very large hole to have in the hull, perhaps seawater could wash into the tank during heavy seas.
How far above the waterline does your vent exit the hull and is it towards the bow/midsection/stern? If you could do it again do you think that a 1" vent would have been sufficient?
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At least one, or better off two vent lines that size, one on each side of the hull on two sides of the tank makes for a great system to promote good air flow to keep the good bacteria happy in your holding take.
Sea water getting into them is a nonissue if properly placed.