Sewer Repair

An old brick sanitary sewer in good condition

An old brick sanitary sewer in good condition

Wall bricks intact but a deteriorating invert

Wall bricks intact but a deteriorating invert

A failure in a sanitary brick sewer

A failure in a sanitary brick sewer

Brick and concrete sewer, prior to repair

Brick & Concrete sewer, prior to repair

The same sewer after gunite repair

The same sewer after gunite repair

  • For more than a century, several layers of brick were used to construct municipal sanitary sewer lines. While thousands of miles of brick sewer lines remain in service, many have deteriorated to a critical point.
  • Numerous old sewers in urban areas are located near or under buildings and other large structures. Replacing these lines using conventional excavation would be prohibitively expensive or impossible. National Gunite offers a way to rehabilitate these lines at a fraction of the cost and complexity of replacing them.
  • If the bricks are still in place, and only the mortar joints are failing, National Gunite can spray on a 1-inch layer of gunite reinforced with polypropylene fibers. This will extend the life of the sewer for decades.
  • If the bricks are loose or missing, stainless steel anchors can be installed into sound material. Reinforcing steel is then secured to the anchors prior to spraying several inches of gunite onto the steel and brick. This adds structural integrity to the sewer, virtually restoring its original design life.
  • National Gunite can rehabilitate sanitary sewers as small as 30 inches in diameter, with no upper limit on the size.