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post #11 of 20 Old 11-17-2008
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If the head is forward, the raw water seacock for it is also likely forward, not back in the engine compartment.
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This was my thought. If the boat is equipped with a true marine head it's probably pulling raw water as well.

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post #12 of 20 Old 11-17-2008
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Key word being "likely". I remember the raw water intake for my Dad's Chris Craft was back by the engine even though the head was quite a bit forward.

The only way to figure out what it's for is to follow it. Head or water maker are the only things I can think of that would use raw water. Most sinks and showers (at least that I have ever used) use fresh water.

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post #13 of 20 Old 11-17-2008
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Plenty of boats have had salt water galley sink intakes, either hand or electric pumps, for rinsing dishes, or even for washing them, to conserve fresh water supplies for drinking/food preparation.

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post #14 of 20 Old 11-17-2008
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Especially if the boat was outfitted for long distance cruising, since the water in most harbors is rather nasty...
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Plenty of boats have had salt water galley sink intakes, either hand or electric pumps, for rinsing dishes, or even for washing them, to conserve fresh water supplies for drinking/food preparation.

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post #15 of 20 Old 11-17-2008
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At the risk of being overly simple, I suggest that the second through-hull is to drain galley sink water. It is on my boat.
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At the risk of being overly simple, I suggest that the second through-hull is to drain galley sink water. It is on my boat.
Assuming it's above the waterline. The way it was described I think the seacock in question might be below.

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Especially if the boat was outfitted for long distance cruising, since the water in most harbors is rather nasty...
Kinda like the water at RV parks. We always hooked up a 2 stage filter between the water supply and the hook up.

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Given that it was described as being beneath the engine... I'd guess it was below the water line.
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Assuming it's above the waterline. The way it was described I think the seacock in question might be below.

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Quote:
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Assuming it's above the waterline. The way it was described I think the seacock in question might be below.
A below-water-line seacock will still drain a sink, as long as the bottom of the sink itself is above the waterline!

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post #20 of 20 Old 11-17-2008
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on my hunter 27 the head intake is under the v berth starboard side, right next to the off shore holdng tank pump out. the sink has a large valve behind the galley cabinet under the cockpit. i have the hunter plumbing drawings and mine matches the drawing. i wonder if someone added a salt water rinse for the sink, how many faucets does your boat have? the only seacocks are the head flush and over board pump under the vberth, and the raw water intake under the engine per the drawing. the other must be added
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