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post #3 of Old 01-20-2009
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Rik, I use a more simplistic approach. Omit the Y-valve and send everything to the holding tank. From the holding tank effluent use a "T"-fitting that leads to the deck pump out or to a macerator pumping directly to a seacock. No Y-valve is needed with this set-up,- when pumping out from the deck all suction is applied to the tank as the seacock is closed. When using the macerator pump all suction is applied to the tank because the deck plate is closed. To be in compliance with restrictions you will need to have the seacock wired shut; the handle off the seacock; or access to the seacock locked. As always keep the tank vented. 'far less space required. 'take care and joy, Aythya crew
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