If the outer casing of the existing pipe has been penetrated, perhaps by a strong root system, this can cause many problems, and again, simply coating the interior of the pipe will offer little protection or benefit.
Isnt operating the mole a little bit like driving a car with your eyes shut?
For people unfamiliar with a septic tank, it is a system for getting rid of sewage where public sewage systems aren’t available. Usually it is a buried watertight holding container in which waste solids settle to the bottom and become sludge. Enzyme and bacterial action breaks down liquid waste before it is discharged into a drain field for further treatment by the soil to get rid of damaging bacteria and viruses. Septic tanks need continual pumping and cleaning of sludge in order to guarantee correct water levels and treatment of wastewater. Flooding and drain backups can happen if the sludge isn’t removed and the water level gets too high.
