Customer called us out for a mainline blockage. I tested the line and it was still holding water. I then checked water heater and house pressure. Water heater was 20 years old and house pressure was 100psi. Customer did not want these looked at today. I recommended running a cable machine down the line to clear the blockage. Customer agreed. I ran it down 10 times with different heads before finally clearing the line. I pulled up some roots and wipes.