I have a small leak coming from my black water connection at the tank. I will try to describe what I have. The leak is where the 3" pipe comes out of the tank. It appears to have plumbers putty and then it is clamped. The biggest problem is space to repair it. The shut off valve is only about 3 inches from the tank and after the valve it makes a 180 degree turn. It then has a long straight run to the drain connection. I thought of just cutting the straight run, repair the leak, and then fix the cut pipe. Anyone have this problem before?