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post #6 of Old 08-14-2012
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Re: Clearing the Holding Tank Vent Hose

Our vent line exits the side of the boat. However, from the inside, you can see that it makes a loop up by the decks and then returns down to the fitting. I'm sure this is for anti-siphon. However, simply directing a hose spray from the outside, is not likely to make it to our tank. If I were to force the hose into the fitting, it would pressurize the tank, as the displaced air would have nowhere to go. The vent is blocked! Even opening the pumpout fitting may not work, as the intake is likely below the tank contents, so air will not escape. Be careful.

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Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
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