Riser and Drainage Line Rehabilitation — Porto

Internal Rehabilitation Project with Continuous Epoxy Application

Project context

A condominium located in the center of Porto, over three decades old, was facing constant leaks in the drainage risers and stormwater lines.
Video inspections carried out by REVIPOX revealed degradation in internal pipe connections and multiple infiltration points throughout both vertical and horizontal networks.

Traditional replacement would have required demolishing walls, removing finishes, and interrupting apartment use — a time-consuming and costly solution the condominium wanted to avoid.

Objective

To achieve complete rehabilitation of the building’s drainage and stormwater systems through continuous epoxy resin application, restoring pipe integrity without demolition and extending the system’s lifespan for several decades.

Solutions applied by REVIPOX

• High-definition CCTV video inspection to identify cracks, leaks, and weak joints.

• Mechanical internal cleaning with rotary brushing and controlled jetting to remove corrosion and buildup.

• Continuous application of two-component epoxy coating, adapted to different pipe diameters (ranging from 50 mm to 160 mm).

• Forced drying and thermal curing, creating a new internal wall that is smooth, watertight, and highly resistant.

• Final video verification to confirm uniform coating and total sealing.

Results

After the intervention, the drainage and stormwater systems showed:

• Complete elimination of leaks and infiltrations.

• Reinforced connections without physical pipe replacement.

• Improved hydraulic flow due to the new smooth internal surface.

• Reduced vibration and noise levels in vertical lines.

• Estimated service life exceeding 50 years.

The project was completed in four working days, without interrupting building operations or causing any disturbance to residents.

Technology used

• Continuous epoxy internal coating system.

• 360° HD video inspection system.

• High-speed mechanical rotary cleaning (1,200 rpm) with precision jetting.

• Hot air curing system for uniform and fast resin hardening.

Client testimonial

“The old system was in poor condition and we had constant leaks.
The REVIPOX team solved the issue without breaking walls — and in just a few days, the building’s system was fully restored.”
— Condominium Manager, Porto

Conclusion

This project demonstrates how continuous epoxy internal rehabilitation is the ideal solution for vertical and horizontal drainage networks in aging condominiums.
REVIPOX technology allows entire systems to be restored without destructive work, delivering immediate and long-lasting results.

REVIPOX — The new life of pipelines begins from within.