Join Date: Feb 2010
Location: Narragansett Bay
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Re: Installing a traditional head from scratch
Good advice above. Here's a couple of things to keep in mind.
Get the absolute largest holding tank you can possible jam in. A critical method to prevent odor is to flush sufficient clean water (salt or fresh), after you empty the bowl. That can take a total of 2 or more gallons per flush!! 90% of boaters fail to do this and 90% of marine heads smell.
Secondly, be sure there are no dips in the waste lines that will hold effluent. Keep in mind that the hose will weigh more with water in it, so be sure it wont' dip after you run it. Bracing can help.
Never ever put anything in your tank that you didn't eat.
Run a large vent line, minimum 1 inch. Two is a great idea, but not mandatory.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.