What Is CIPP Pipe Lining?
CIPP — cured-in-place pipe — is a trenchless pipe rehabilitation method in which a flexible tube impregnated with liquid thermoset epoxy or styrene resin is inverted (or pulled) through an existing damaged pipe and then cured in place using ambient heat, steam, hot water, or UV light. The cured liner forms a hardened, seamless, jointless pipe-within-a-pipe that restores structural integrity and flow capacity to the original pipe run.
The installed liner is NSF-61 compliant for potable-adjacent applications and carries a manufacturer-rated 50-year design life. The method is governed by ASTM F1216 (inversion installation) and ASTM F1743 (pull-in-place installation) and is an approved NASSCO rehabilitation technique — the same standards municipalities use on sewer-main rehabilitation contracts. Wooley installs Perma-Liner and LMK felt-liner systems for residential laterals and fibreglass-reinforced liners for larger commercial and municipal applications.