How Long Does Pipe Relining Last? Warranty & Lifespan Explained

How Long Does Pipe Relining Last? The Short Answer: 35+ Years

CIPP (cured-in-place pipe) liners carry a 35-year manufacturer warranty when installed correctly. Independent long-term testing suggests actual liner lifespan can exceed 50 years — longer than most of the clay or concrete pipes they're installed inside.

Why Relined Pipes Last So Long

The epoxy resin liner, once cured, creates a seamless, jointless pipe within the original pipe. There are no joints for tree roots to infiltrate, no corrosion points, and no sections that can settle or shift. The resin material is highly resistant to chemical attack from household waste and groundwater. Compare this to the original clay pipes in older Melbourne homes — those have joints every 900mm–1800mm, each one a potential failure point.

What the Warranty Covers

The manufacturer's 35-year warranty covers structural defects in the liner material itself — delamination, liner collapse, or resin failure under normal operating conditions. It does not cover damage caused by external forces such as ground movement, third-party excavation through the liner, or misuse. Always ask your plumber for the warranty documentation when relining is completed — it should be provided as a matter of course.

What Affects Liner Lifespan?

Installation quality matters significantly. Proper pipe preparation (clean walls, no debris), correct resin mixing ratios, adequate curing time, and proper reinstatement of side junctions all affect long-term performance. ATC Plumbing follows manufacturer specifications on every job and provides a post-installation CCTV inspection to verify liner quality before leaving site.

Want to know if your pipe is a candidate for relining? Call ATC Plumbing on 1300 282 758 for a CCTV assessment across Melbourne's south-east.