Thanks James i will detach the hose from the valve to see if it is leaking, thanks.Your Macerator discharge valve is leaking.
My best guess...
Here is why I am guessing this.
1) Macerator discharge valves are below the boat's static water line.
2) If the valve is not sealed, it will slowly flow backwards and slowly fills the Hold Tank.
There is no GREY water tanks on Hunter boats.
Jim...
PS: Yo hablo Español. Si te quieres, podemos hablar en un mensaje privado.
Trans.: I speak Spanish. If you want, we can talk in a private message.