High-density Polyethylene Piping Products
Large-diameter pipe: super-size the benefits of HDPE.
Longer life, more material flexibility, lower maintenance and leakproof reliability. In sizes up to 136 or 157 inches — delivered with everything you need in a large-diameter solution.
Why choose ISCO for your large-diameter piping needs?
No other provider has the product selection and expertise in HDPE large-diameter applications that ISCO offers. From pipe and custom fittings to the McElroy Talonâ„¢ large-diameter fusion machine, ISCO has everything you need to design the benefits of HDPE into your large-diameter project:
- Available in sizes up to 136" (up to 157" in low-pressure or gravity applications)
- Reliable and cost-effective for a range of applications
- 100-year design life, leakproof joints; virtually maintenance-free
- High resistance to chemicals and corrosion, wear and tear, and UV radiation
- Large-diameter HDPE fittings and structures such as manholes, tanks and vaults
- Lighter weight for fast and efficient installation both on- and offshore
- Designed for high-volume flow applications and pressurized ratings
Unparalleled HDPE piping expertise

ISCO is the expert in large-diameter HDPE pipe with extensive experience and fusion equipment to install large systems for a range of applications including irrigation, industrial, waste/stormwater, irrigation, municipal, landfill and more.

Custom fusion training, fabrication and project management services for a comprehensive pipe project solution. Our highly skilled team of design professionals will work with you to develop the right solution for a pipeline project of any size.

Large-diameter HDPE pipe and fittings are ideal for a wide range of applications — in solid- and profile-wall (Spirolite®) product lines — durable and flexible enough to support installation methods such as horizontal directional drilling.
Large-diameter fusion: Think big
ISCO is the only industry partner with two of fusion leader McElroy’s biggest machines for large-diameter piping projects.
McElroy’s Talon™ 2000 is revolutionizing large-diameter pipe fusion with its innovative jaw design, self-loading and self-propelled controls, touch-screen interface and data logging features.
Large-diameter versatility
ISCO is the go-to resource for large-diameter piping projects.
Solid-wall piping
ISCO offers a full selection of solid-wall piping, fittings and structures in pipe diameters up to 136"
Profile-wall piping
Spirolite®, ISCO’s profile wall HDPE piping, offers a lightweight solution with all the benefits of HDPE in diameters up to 120"
TracStar® iSeries
McElroy’s advanced TracStar iSeries fusion equipment provides new levels of performance, control and reliability
Large-diameter applications
ISCO large-diameter products have an impressive track record of success in a variety of applications.

Ideal for water/wastewater applications with its H2S resistance, leak-free joints, long product life and cost-effectiveness

Durable, corrosion- and chemical-resistant, requiring no cathodic protection, linings or wraps; little or no maintenance

The durability and installation benefits of HDPE with in-house fabrication for virtually limitless design options

Faster, easier, less costly no-dig installation with minimal traffic disruption through the Snap-Tite® large-diameter lining system

More durable and environmentally sound than metal or concrete pipe for irrigation districts, small hydro producers and municipalities

A less costly, longer-term alternative to concrete piping — leakproof joints and easier install with lower maintenance and operational costs
Access our deep HDPE resources
Posts
Why Large-Diameter HDPE is Replacing Concrete and Steel in Stormwater and Sewer Projects
Large-diameter HDPE pipe is increasingly replacing concrete and steel in stormwater and sewer projects. With faster installation, corrosion resistance, and lower lifecycle costs, HDPE offers municipalities, engineers, and contractors a more durable solution for modern infrastructure demands.
Field Reports
Putting the Squeeze on HDPE Repairs
The Footage Tools C2400 helped ISCO and partners complete a first-of-its-kind repair on a 24-inch HDPE water pipeline near Midland, TX. By safely shutting off flow without damaging the pipe, the tool enabled a faster, more efficient repair that saved time and money.
Posts
Move Over Legacy Pipes: Meet Spirolite®—Lightweight, Corrosion-Proof Piping Solution for Water and Wastewater Systems
Introducing a rising force in piping solutions—Spirolite—engineered for easier installation, superior corrosion resistance, and a 100-year lifespan that outlasts traditional materials.