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From my previous response to your other post on this subject in another thread:
The cleanout has to be on the bottom of the tank to drain the tank properly—if it was on the top of the tank with a pickup hose, it would have to leave a inch or two of standing sewage in the tank when you pumped out the tank. This would form a solid layer of crap on the bottom of the tank in relative short order, necessitating a tank replacement—unless you were willing to dig the stuff out manually. . The hose from the head usually enters the tank at the top or fairly high up so that the head doesn't have to pump
against the contents of the tank and that the tank won't siphon back into the head bowl if your joker valve fails.
If you want a toilet that won't clog easily and doesn't use electricity, the best one to install is a Lavac. They're pretty bullet-proof, but are fairly expensive. They are plumbed slightly differently than a typical marine head as they use vacuum to evacuate the bowl, not a standard dual-action piston pump
. Many cruisers like them because they're very low maintenance and relatively problem free and use less water than many other designs do.
The Headmate should work just fine with a holding tank. You don't need a macerator pump.
Putting a filter on the vent hose is a bad idea IMHO. The filter will reduce the air flow, reducing the flow of oxygen to the holding tank and promoting the stinky anaerobic bacteria. The oxygen bubblers are a waste of money, provided the tank is properly vented.
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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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Still—DON'T READ THAT POST AGAIN.
Last edited by sailingdog; 03-14-2008 at 02:19 PM.