I was having a lot of trouble with the plumbing getting clogged up in this particular property. Especially when it rained.
Come to find out the roots outside the home were growing in the pipes. These pipes were made out of clay and the roots like to find the water source and break the pipes. The solution is to get a Backhoe and operator for half the day to dig up the old pipes and replace with PVC. Where did I get this info??? My day job as an engineer 😛