xylene
Senior Member
One, it is a septic system, not a sewer. So rain (or lack of), changes in the water table, permeability of the field, all those things can cause slow running. Which lead to backup and clogs. Without anything but water waste and tp in the equation.Sewers don't develop clogs and back up due to "normal use".l
Even in sewers, water conditions, pipe conditions all call lead to the accumulation of biofilm, fouling and clogs. Without anything but water waste and tp in the equation.
Your logic is that a clog proves tenant fault - which is... water waste and tp.