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I have a 33 hunter cheubini I picked up last fall and have been slowly going threw stuff .. I notice the bildge pump drain hose were it exits the hull comes up from underneath but loops above the thu hull fitting than down than out is there a reason for that ? splash back? acts like a plumb trap?..seems kinda tight and subject to crack hose there... or just sloppy wokmanship like the wiring which is another nightmare that needs addressing
 

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Most electric bilge pumps won't prevent water from flowing back through them, so the high loop is probably to prevent water from pouring in through the bilge pump when heeled.
 

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Boats have been sunk in the past by siphoning water into the bilge pump hose. Ideally the outflow through-hull would remain above water, but as mentioned this may not be true with a heel. Some vessels, including my own have a loop as you described and additionally an anti-siphon valve at the top of the loop. 'take care and joy, Aythya crew
 
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