So I had my sewage tank pumped like a month ago. My son recently filed the whole thin up with water, what can u do? I told everyone, no toilet until I get it pumped out again. It was so full that I had to scoop out pee and water from the toilet to keep it off the floor. Yesterday I went to get it pumped out again. Nothing would pump out. They said it was empty. I knew that was not possible. I dig around, looked under the floor, looked under the frig and found a pump. It is the macerator pump. It pumps my full 9 gallon tank to a much larger tank under the floor where it can be pumped out. Ok feeling stupid but thankful that I now know how to work that part