CIPP Lining for Large-Diameter Pipes solves the rehabilitation problems standard lining can’t reach.

WHAT IT IS

What large-diameter CIPP lining actually does to a deteriorating pipe.

CIPP lining installs a structural liner inside an existing pipe without excavation. For pipes 12 inches and above, the liner is specified to handle full structural loading — soil weight, traffic loading, and hydrostatic pressure — independent of the host pipe.

The process is the same as residential CIPP but with heavier felt liner, longer cure times, and larger inversion equipment. LiningWorks scopes the full run before specifying liner thickness, confirming access points, and developing the installation sequence.

Every large-diameter CIPP installation finishes with post-installation CCTV camera verification of the full liner run — confirming bond, joint coverage, and absence of voids before the project is closed out.

PIPE TYPES SERVED

Large-diameter pipe materials and applications where CIPP relining applies.

Large-diameter CIPP lining applies across a range of pipe materials, depths, and service environments — including systems that small-diameter lining equipment cannot reach.

• Reinforced concrete pipe (RCP) in storm drain systems

  RCP storm drain infrastructure ages through joint failure, hydrogen sulfide corrosion, and abrasion. CIPP lining arrests further deterioration and restores hydraulic capacity without excavation.
• Vitrified clay pipe (VCP) sewer mains 12 inches and above

  Larger-diameter VCP sewer mains suffer the same joint failures as smaller pipes — but the stakes are higher and open-cut replacement costs are significantly greater.
• Corrugated metal pipe (CMP) in culverts and storm systems

  CMP culverts corrode from the inside. CIPP lining installs inside the corrugated profile, restoring structural integrity and providing a smooth interior for hydraulic performance.
• HDPE and PVC systems with liner or joint failures

  Even relatively modern HDPE and PVC large-diameter systems develop liner failures and joint gaps. CIPP relining rehabilitates these systems entirely from the interior.

BEFORE & AFTER

24-inch RCP storm drain CIPP rehabilitation in Southpark, Charlotte.

A 24-inch RCP storm drain under a heavily trafficked commercial parking lot showed advanced joint separation, significant root intrusion, and early-stage wall corrosion on camera inspection. Open-cut replacement would have required demolishing and repaving a substantial section of the lot.

LiningWorks installed a structural CIPP liner through the full 110-foot run — accessed entirely from manholes at each end. Post-installation camera confirmed full bond throughout. The parking lot surface was never disturbed.