America's Underground Infrastructure Is Falling Apart
Every city runs on infrastructure nobody sees: manholes, lift stations, wet wells. Sewer gas eats the concrete, and years of corrosion end in leaks and lost strength. Cities have spent decades paying for temporary fixes to a permanent problem.
The Triplex Liner System Is the Permanent Fix
The Triplex Liner is not a coating. It is a new structural wall of fiberglass and a continuous corrosion barrier, cured in place inside the existing structure. The structure gets its strength back and keeps it.
The system has been patented, proven in service, and designed and tested to last up to 100 years in sewer conditions.
It is installed in cities across the United States, Canada and Australia.
How It’s Done
Every liner is measured against the structure it will repair and custom built at our factory. On site, the work moves fast: the structure is prepped, the liner is cured in place, and the structure returns to service. For a typical manhole, installation is completed in a single day.
Engineers can request the full specification package. The disruption a city fears from rehabilitation is the part we engineered out.
Measured and Built
Every liner starts at our factory in Northwest Florida, custom built to the measurements of the structure it will repair, in two pieces: the shaft and the bottom disc.
Prepped and Installed
On site, the structure is cleaned back to sound wall. The crew saturates the liner, lowers it in, presses it into full contact with the structure, and cures it in place with steam and air.
Back in Service
The inlets and outlets are cut and reopened, and the structure returns to service with a new structural wall inside the old one. Installation for a typical manhole is completed the same day.
Do It Right Once
Temporary fixes like spray-ons and coatings protect a surface for a short time. Real rehabilitation requires the Triplex Liner: the structure gets its strength and its corrosion protection back in one operation.
That is why cities that have tried both specify the liner. It turns a maintenance cycle into a finished repair.
Built for the Toughest Jobs
Deep, in freezing temperatures, in the middle of Edmonton, Alberta. Some structures are critical to a city's health and nearly impossible to take offline: deep, downtown, on streets that cannot close. That is the work this system was built for. The liner goes in through the opening that is already there, one piece, built for that structure, and the street is back the same day.
Working in North Dakota
We work with North Dakota municipalities, utility districts and consulting engineers on manhole, lift station and wet well rehabilitation. If rehabilitation is in your capital plan, we can help scope and specify it.
Triplex Liners in North Dakota
There is Triplex Liner work in North Dakota, in Richardton, in 2026. Every liner was made at our plant in Northwest Florida, built to the measurements of the structure it was going into, and cured in place inside it.
Cities in North Dakota With Triplex Liners in the Ground
Richardton.
Where We Take Projects in North Dakota
We take projects across the state. Fargo, Bismarck, Grand Forks, Minot, West Fargo, Williston, Dickinson, Mandan and Jamestown, and the districts and authorities between them.
What North Dakota Asks Before You Build
North Dakota requires plans and specifications for any public sewerage system to be approved by the state before construction, and construction to follow what was approved. The state reviews against the regional recommended standards rather than a leakage figure of its own.
Nothing about lining changes the geometry a reviewer approved. The liner goes inside the structure that is already permitted, in its own footprint, and the street above it stays where it is.
Three Ways In
What the liner costs a city over its life, and what the warranty covers.
Go →Writing a spec?EngineersRequest the specification package: product data, section details and specification language.
Go →Install for a living?ContractorsThe Triplex system is licensed to trained contractors, and we are signing across the country.
Go →Questions We Get in North Dakota
Do you line lift stations and wet wells, or just manholes?
Both. Manholes are the core application, and lift stations and wet wells are lined with the same system.
Does the structure have to come out of service?
Usually for no more than a single shift. Most manholes are lined and returned to service the same day.
How is this different from an epoxy or cementitious coating?
A coating protects a surface. The Triplex Liner is a structural wall with its own corrosion barrier, cured in place inside the existing structure.
How long does it last?
The liner is designed and tested to last up to 100 years in sewer conditions. Manholes carry a twenty-year warranty, and lift stations and wet wells carry ten years.
Who installs the liner here?
Trained crews licensed on the Triplex system. Contact us with your project and we will route it.