Hello Fellow members,
I have a 1980 401 Commander I have been refitting her for 2 years she sat for a decade. I have tried to fill the freshwater tank and all that happens is the bilge pumps kick in. I suspect the tanks are compromised. IF that is the case what have others done to correct this? I have heard of bladders but I have a queen bed over the gas tanks and the freshwater tank is underneath? any ideas?
John, I would think that there is a drain plug for the fresh water tank that is open or missing. Fresh water systems have to be drained for winterizing. You might have someone add water to the tank while you are in the bilge so you can find the drain.
I'll add that you should inspect the main supply line from the tank to the suction side of the water pressure pump. More specifically, check that the hose connection at the tank is tight and the hose is intact.