Applications
Geothermal systems
Sustainable, earth-friendly HDPE geothermal piping solutions.
ISCO provides durable, leak-free geothermal piping systems for efficient heating and cooling. Our HDPE geothermal pipe, vaults and custom-fabricated components deliver long-term performance for commercial and district energy projects.
Why Choose HDPE for Geothermal?
Corrosion, chemical-resistant material with a proven 100-year design, backed by decades of geothermal experience.
Heat-fused connections create seamless, leak-free joints critical for maintaining system efficiency and preventing ground contamination.
Easier handling, faster installs and the flexibility to accommodate ground loops and withstand below-grade shifting and settling.
Proven durability in extreme soil and weather, while maintaining thermal conductivity properties.
Complete Geothermal System Support
ISCO delivers more than products. We provide the expertise, fabrication and nationwide resources to supply and support an entire geothermal system from start to finish.
Design and Project Support
Comprehensive support from tailored system layouts and specifications to full project coordination, plus training and field guidance to ensure proper installation.
Custom Fabrication
Prefabricated manifold headers and Spirolite® Circuit Maker® vaults designed for fewer joints, faster installs, and long-lasting watertight performance.
Equipment & Materials
From McElroy fusion machines to nationwide supply of thermal grouts, sands and detection tape, ISCO provides the tools and materials needed for a seamless system.
Circuit Maker Geothermal Vaults®
HDPE Geothermal Pipe is Just the Beginning.
A geothermal system is only as strong as its vaults. ISCO’s custom-fabricated Circuit Maker Vaults are built from polyethylene for unmatched durability and watertight performance.
- Custom fabrication and walkways
- 100% leak-free polyethylene structure
- Butt-fused circuitry with McElroy
DataLogged joints - OSHA-Compliant access ladder
and safety features - Custom fabrication and walkways
- 100% leak-free polyethylene structure
- Butt-fused circuitry with McElroy
DataLogged joints - OSHA-Compliant access ladder
and safety features
Products for Geothermal Applications
HDPE Geothermal Pipe & Fittings
Durable, corrosion-resistant pipe with a 100-year design life. Plus, all the fittings for a complete geothermal system.
Geothermal Vaults (Circuit Maker)
Leak-free, corrosion-proof vaults built to protect your geothermal investment for decades.
PE-RT Pipe
for High-Temp Systems
Specialized pipe for pressurized, higher-temperature geothermal loops.
Prefabricated Headers & Manifolds
Custom-built headers and manifolds for streamlined installation, less field joints, and lower labor costs.
Fusion Equipment & Field Connections
Industry-leading McElroy fusion machines and productivity tools, for rent or purchase.
Thermal Grout, Sand & Detection Tape
Full line of geothermal accessories to enhance thermal conductivity and protect underground systems.
Expertise That Saves Time and Cost
With decades of geothermal experience, ISCO provides more than pipe. Our technical team partners with you from design to commissioning—ensuring geothermal systems that install faster, perform better and last longer.
