What year is your coach (pre-1980)? Does it have a steel holding tank or is it plastic? If it is made of steel, read the response on 3/7/2001. How full was your tank when you found the leak (turn off the water pump and look down the toilet with a flashlight)? Do you have the electric powered waste treatment system? Was there moisture on top of the tank? Was the coach level? If so, which side was the black water dripping out of?
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