thread liner

Trenchless Culvert Rehabilitation Made Simple

For over two decades, Snap-Tite® has set the standard in trenchless culvert rehabilitation. With its proven HDPE materials, quick installation, and unmatched reliability, the Thread Liner System offers engineers, municipalities, and contractors a cost-effective, long-lasting solution for renewing aging culvert infrastructure.

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overview

The Snap-Tite® Thread Liner System is a durable, trenchless solution for rehabilitating failing culverts and storm drains without excavation. Made from solid-wall HDPE, the Thread Liner features a precision-engineered threaded joint that creates a watertight seal between pipe segments—no fusion, welding, or adhesives required.

This innovative design enables fast, efficient installations even in tight-access or remote locations, restoring structural integrity and extending the lifespan of existing infrastructure by 50 years or more. Whether for municipal, DOT, or private culvert systems, Snap-Tite® delivers a proven, low-disruption solution for aging pipelines.

details

cost-effective performance

Snap-Tite® Thread Liner dramatically lowers total project costs by eliminating open-cut excavation and reducing surface restoration. Contractors can install the system with small crews and minimal equipment, cutting labor and equipment costs while completing projects in a fraction of the time.

By using the existing culvert as the host pipe, Snap-Tite® avoids major roadway disruptions, environmental impact, and traffic control expenses—delivering up to 60% savings compared to full replacement. The HDPE material requires no maintenance and resists rust, joint failure, and chemical degradation, offering one of the lowest life-cycle costs in culvert rehabilitation.

key benefits &
applications

key benefits

Trenchless Installation – No excavation or road closure required
Watertight Threaded Connection – Mechanically locks and seals without heat or fusion
Lightweight & Easy to Handle – Ideal for tight or confined installations
Long Service Life – Corrosion and abrasion-resistant HDPE provides decades of performance
Quick Assembly – Fewer components and faster field installation minimize downtime

applications

Highway & municipal culvert rehabilitation
Storm drain and outfall renewal
Industrial or private site drainage systems
Cross drains beneath railways and roadways
Trenchless relining where excavation is not feasible

dimensions

Standard Thread-Liner comes in a diameter range of 3” to 20”, and a standard length of 30”(2.5 feet lay length). Additional diameters and custom lengths may be available upon request. Typically, it comes in 2- to 3-foot sections for manhole-to-manhole installation. These sections can be connected together, all with strong water-tight seals. These advantages also make Thread-Liner the preferred answer for pipe renewal. Simple installation means light duty equipment, less manpower, minimal disturbance of right-of-way, and indefinite service life.

When considering these benefits, it becomes clear that the Thread-Liner system is the most cost-effective way to rehabilitate deteriorating drainage piping systems. It may be the last solution you’ll ever need. The Thread-Liner joint and installation system allows the replacement of failing systems without the need to remove existing pipe or excavation.