I have two black tanks as I have two bathrooms. I made a splinter so would not have to turn water off at source. Bad idea so I was flushing tanks and forgot to turn water off for the flushing. Next that happened my neighbor tells me I am leaking water in the front of my big horn 3875fb.it was not on for a long timethe water that overflowed did not smell like black water it was also clear. How did this water get out of the tank and was there any damage got rid of splinter but flushing does not appear to be very strong