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Old 09-28-2020, 03:14 PM   #12
Comodave
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City: Au Gres, MI
Vessel Name: Black Dog
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On the vent fitting on the hull there is no need for a screen, so I would get rid of the screen. Every time you pump out you should flush water back into the tank through the vent so you will keep it free from clogs.

A simple way to get a good seal on the deck pump out fitting is to slowly run water around where the hose is connected to the pump out fitting. If there is a vacuum leak then it will suck in water rather than air. Have you tried flushing water back into the tank through the pump out fitting? That will tell you if there is a clog at the tank where the pump out hose connects to the tank. Maybe give it a good shot to unplug anything stuck in the hose...
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