Southwark Metal sp101826 Spiral Pipe 18in 26ga 10ft

Product Description

The SOUTHWARK METAL sp101826 is a 26-gauge hot-dipped galvanized steel spiral pipe designed for low- to medium-pressure HVAC duct distribution systems. Measuring 18 inches in nominal diameter and 10 feet in length, this round spiral pipe is a standard component in commercial and residential forced-air ductwork installations. It is rated for a pressure range of -4 to 10 inches water gauge (in-WG), making it suitable for supply and return air trunk runs and branch connections. HVAC sheet metal mechanics and duct installers work with this pipe during new construction and system retrofit projects.

This spiral pipe is used in forced-air heating and cooling duct systems where a rigid, round galvanized duct section is required. The 18-inch diameter accommodates higher-volume airflow runs typically found in commercial light construction, large residential systems, and mechanical rooms. At 10 feet per section, it reduces the number of joints needed on long straight runs, improving system efficiency and reducing potential leak points. Installation is performed by licensed sheet metal workers and HVAC mechanics.

Key Features

• 26-gauge steel construction provides a balance of rigidity and workability for field cutting and fitting
• Hot-dipped galvanized finish resists corrosion in both interior and exposed mechanical spaces
• Pressure rating of -4 to 10 in-WG covers standard low- and medium-pressure duct applications
• 18-inch nominal diameter suits high-volume supply and return air runs
• 10-foot length minimizes joint count on straight duct runs
• Spiral seam design adds structural rigidity compared to longitudinal-seam pipe

Compatibility

Designed as an OEM-style spiral round duct section compatible with standard 18-inch round duct fittings, elbows, tees, and collars used in low- to medium-pressure HVAC distribution systems.

Installation Notes

Installation should be performed by a qualified sheet metal mechanic or licensed HVAC technician in accordance with SMACNA duct construction standards and applicable local mechanical codes. Power down the air handling unit and isolate the duct section before cutting into an existing system. Secure all joints with approved sheet metal screws and seal with UL 181-listed mastic or foil tape rated for the operating pressure class. Wear appropriate cut-resistant gloves when handling cut sheet metal edges.

Technical Specifications

• Model: SP10
• Nominal Diameter: 18 inches
• Length: 10 feet
• Gauge: 26 ga
• Material: Steel
• Finish: Hot-Dipped Galvanized
• Pressure Rating: -4 to 10 in-WG

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: sp101826