Spiral Manufacturing Co., Inc.

Spiral Manufacturing Co., Inc. is a trusted supplier of PVS (Polyvinyl Steel) underground ductwork and pipe systems designed for HVAC and corrosive industrial applications. Combining the strength of galvanized steel with the corrosion resistance of a durable polyvinyl coating, its PVS products deliver long-lasting performance in underground environments. The company manufactures a complete range of underground ducting components, including pipe, elbows, reducers, tees, taps, and custom fittings to meet project requirements. Engineered for durability, chemical resistance, and easy installation, Spiral Manufacturing’s PVS underground duct systems provide reliable, code-compliant solutions for commercial and industrial air distribution applications.