Join Date: Feb 2010
Location: Narragansett Bay
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Re: Head hoses
Does the waste line go from the head up to a vented loop and back down to the holding tank? Not sure if you're considering that in your measurements. Its usually the case, to prevent siphoning the worst stuff on the boat, back into the boat.
As for the raw water line, I would use quality stuff there too, however, it must be rated to be below the water line. Its as important it can't burst and sink the boat as permeate. This line will have standing seawater for as long as you're away. The organisms in it will die and that first flush always smells like low tide. I suppose it could permeate as well.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.