hi everyone , well i filled up the fresh water tank on our used 1989 thundercraft 220 magnum . i went down into the cabin and turned on the 12 volt supply turned on the pressure switch, turned on the water tap and no water came out . i can hear the pump running so i lifted the engine hatch and there is the pump running but there is no water line going into the pump or coming out of the pump , i cant even see where a water line would come out of the tank . i told the wife the hose works when we hook it up to the boat the tap works great . what i need to no is how do i get all this water out of the tank that i cant use ? thanks everyone ..