Join Date: Mar 2006
Location: New England
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I think it is a better idea to plumb the head directly into the holding tank, and then plumb the pump out hose of the holding tank to a diverter valve, with one leg going up to the deck fitting and the other going to the seacock and through hull, using a diaphragm pump or macerator pump to allow you to dump the holding tank overboard.
This setup minimizes the amount of plumbing and the complexity of the head as much as possible, while giving you the most flexibility overall. Yes, you lose the ability to directly pump the head overboard, but any place you could dump the head directly overboard, you would be able to pump out the holding tank, so no real loss of utility. Also, this allows you to keep the large seacock for the head system closed most of the time, minimizing any risk of the head back siphoning and such.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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