Join Date: May 2008
Location: Seattle & Whidbey Island
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I agree with Sailingdog - head direct to tank, tank out to a Y-valve to either the deck or the discharge pump which goes overboard.
I wonder if the pump is attached to the discharge leg of the current setup, rather than the head leg. If it were, and the Y valve was set for head to tank, the pump would be set up to go overboard.
I cruise on Canada's West Coast, where overboard discharge is still allowed except in specific areas, and the advantage of always sending waste to the holding tank is that I can pick when and where I discharge the tank, which allows me to avoid sensitive areas and spread my impact over a larger volume of water.