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Old 05-23-2014, 06:20 AM   #4
Bay Pelican
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City: Chicago, IL
Country: USA
Vessel Name: Bay Pelican
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,808
I have never seen a boat with its waste discharge from a holding tank above the waterline. When the water is clear enough I have watched our pump outs and would not want that discharge to be on the surface and likely floating.

Conventional wisdom was to loop the discharge line upwards inside the boat so that the discharge line reached a point above the water line and thus would not flood the holding tank if the thru hull was left open.

In the last few years I have seen more and more boats do away with the above the water line loop and just have a direct discharge. This requires the thru hull be closed unless pumping out. I am happy with this arrangement as it reduces the length of the discharge hose (potential smell) and allows me to rinse the discharge hose with sea water after the pump out and before I close the thru hull.
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