What is pipe lining ? Pipe Lining is a trenchless method of repairing damaged, cracked or broken sewer pipes without digging. Its line installing a new pipe withing the existing pipe, this can create better flow and in sealing off cracks and roots intruding into the pipe. A relined pipe is unlikely to corrode naturally with time so easily. The two part epoxy used to seal it into place is long lasting and very durable. Most predictions put the life span of a relined pipe upwards of 50 years. Pipe lining is a great trenchless method of repairing your existing sewer pipe without expensive and time consuming excavation, causing damage to your driveway, landscape and environment.