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You got it Alan!
I live up north where it freezes quite hard in the
winter. All the other lines either drain out or can be blown out easily
but the one to the depth gauge and the gauge itself traps water so I built
an oil filled diaphram.
James, plumb your gauge to anything that goes
through the hull. I don't see why you couldn't use the port to inflate
your forward main ballast tank but you will have to leave off the check
valve. I guess you could substitute it for a high pressure check valve in
the line before it passes through the hull.
All you need is a small line..... Maybe you could
just drill and tap a 1/4 inch pipe thread hole in the hull and not weld in
anything? You only need a pipe and valve on the inside of the hull.
Nothing needs to connect to the outside. Check with someone that knows
more about structural analysis for the best place to drill a hole.
Dan H.
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