Cut out 3â€™â€™ waste section of drain pipe that is back graded and creating a belly in it. This section is full of waste water and is leaking in the dirt under the house. Turn the water off to the house and had them open every faucet and flush every toilet. This is a precaution for when I cut into the mainline I donâ€™t have wastewater dumping on me. Gathered all necessary tools and material then crawled underneath the house and cut section of 3 inch ABS sewer pipe that was leaking and back graded. Then raised up the Main 3â€™â€™ waste trunk lines an 1-1/2â€™â€™. With the main trunk line raised a re-pipe the section of waste pipe that I had originally cut out. Allowed enough time for the glue to set. I turned the water back on and found zero leaks on the waste pipe.