Join Date: Oct 2004
Location: Narragansett Bay
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Both our Lavacs are Zenith models, which as you noted, have been replaced by the 3rd generation Popular model. The Zenith is more robust with a heavier porcelain bowl - making it more expensive. The Popular was designed to lower costs, though it seems to have a better designed seat lid, the weak point of the Zenith models.
Our forward head has a dedicated Henderson pump for bowl flushing and is plumbed with a Y-valve allowing for either tank discharge or directly overboard. There is also a divertor valve allowing for tank pump-out via a deck fitting, or use of a separate Henderson manual pump for emptying the 25 gal holding tank at sea - while offshore from the NDZ of course.
Our aft cabin head has a third Henderson pump, but only disharges directly overboard - something I've considered changing, if I can decide where to put another tank.
True Blue . . .
sold the Nauticat