Inflow and Infiltration Repair

Reducing Inflow and Infiltration can save governments millions of dollars with a very fast return on investment

Inflow and infiltration can dramatically impact governments’ budgets, both in treatment costs and increased pumping required to move the increase in flow volumes. Our chemical grout injection process is the most optimal way for sealing manholes, lateral lines, and culverts from inflow and infiltration.

CST utilizes the polymer injection process to rehabilitate manholes and lateral lines for sanitary and storm sewer systems. The trenchless sewer repair process can be used in a variety of challenging conditions, including high groundwater tables, unstable support soils, saturated environments, and voids. The chemical grout aggressively seeks out voids around the misaligned or cracked pipe, while sealing it against groundwater infiltration. This same process can be used to prevent soil collapse and soil subsidence, a major contributor to roadway settlement.

The application can be used to help public works managers with the following Inflow and Infiltration repair services:

  • Inflow and Infiltration Repair
  • Groundwater Restriction
  • Joint Realignment and Sealing
  • Structural Stability (such as stabilizing degraded mortar in brick manholes and pipes)
  • Void Fill, Soil Compaction, and Stabilization
CMP Repair Hudson, CO HWY 52 Installation 2
Concrete Stabilization Technologies sewer infrastructure repair

CST Injection Process

The CST polymer injection solutions are a revolutionary way to help seal and stabilize manholes, joints, and lateral lines. This in-situ process allows for us to surgically inject a high-density structural polymer into the voids and loose soils around the manhole or lateral lines. Once injected, the polymer seeks out the voids and rapidly expands to densify the adjacent support soils and encapsulates the sewer.

The inflow and infiltration repair process can also be used in a variety of structure types, including:

  • Corrugated Metal Pipes (CMP)
  • Reinforced Concrete Pipes (RCP)
  • Brick Manholes and Brick Pipes
  • Clay Pipes
  • All Shapes and Sizes including elliptical, oval, egg-shaped, etc.



We are a proven foundation lifting, concrete leveling and trenchless sewer contractor with an impeccable track record and over 22 years of experience and thousands of projects completed. We offer a comprehensive suite of concrete leveling solutions and services.


We ensure that our team operates with the highest level of integrity and diligence, to ensure our projects are completed to the highest levels of quality and customer service.


We are the most experienced provider of Polyurethane Soil Stabilization applications, including solutions like concrete leveling, water control, carbon fiber concrete reinforcement and soil swelling mitigation and trenchless sewer repair. We place great emphasis on research and design and continuously innovating our applications and the foundation lifting industry.