America's Sewer Structures Are Wearing Out
Every city runs on structures nobody sees: manholes, lift stations, wet wells. Sewer gas eats their concrete year after year, and that corrosion is what finally lets groundwater push through, as infiltration and as lost structural integrity. Cities have spent decades paying for temporary fixes to a permanent problem.
The Triplex Liner System Is the Permanent Fix
We invented a different answer: not a coating sprayed on a failing wall, but a new structural wall cured in place inside the old one.
Two layers of structural fiberglass around a continuous corrosion barrier, fabricated for the exact structure it repairs. Patented, proven, 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, and we welcome work beyond them.
Do It Right Once
A coating protects a surface until the surface fails again. A structural liner replaces what the structure lost, its strength and its corrosion protection, in one operation.
That is why cities that have tried both specify the liner. It turns a maintenance cycle into a finished repair.
How It’s Done
The short version of the installation manual: the liner is measured and custom built at the factory, the structure is prepped and the liner installed, and the structure goes back into service. For a typical manhole, the same 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. For a typical manhole, the same day.
Built for the Hard Ones
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, sized to the structure, and the street is back the same day.
Working in Montana
Montana municipalities and consulting engineers specify structural lining for manholes, lift stations and wet wells across the state. If your district is planning rehabilitation work, we can walk a project from evaluation to specification to installed liner.
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 by territory to qualified contractors.
Go →Questions We Get in Montana
How long is the structure down?
A typical manhole is lined in four to six hours and returned to service the same day. Larger structures take longer.
We have used coatings before. What changes?
A coating depends on the wall underneath it. The Triplex Liner is a new structural wall, cured in place inside the old one, with the corrosion barrier built into it.
Is this only for manholes?
No. Manholes are the core application, and the same system lines lift stations, wet wells, pump stations and culverts.
What is the service life?
Up to 100 years in sewer conditions, designed and tested. The materials warranty is twenty years non-prorated on standard manholes and five years on wet wells, pump stations and culverts.
Can it go in where the structure is still leaking?
Yes. The system is designed to be installed against active groundwater, so the infiltration does not have to be stopped first.
Get Involved
Whether you manage a city's structures, write specifications, or install for a living, it starts with a conversation. Tell us what you are working with, and we will tell you honestly whether the Triplex Liner is the right fix and what the next step looks like.