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The AIR FLOW PRODUCTS PI04SL is a snap-lock galvanized steel pipe section used in residential and light commercial HVAC duct systems. Fabricated from 30-gauge galvanized steel, this round pipe section measures 4 inches in diameter and 5 feet in length. The snap-lock seam construction allows for fast, tool-free assembly during duct runs, making it a standard choice for HVAC installers working on forced-air heating and cooling systems. The galvanized finish resists corrosion and provides long-term durability in both conditioned and unconditioned spaces.
This pipe section is used in round duct systems for supply and return air distribution in residential and light commercial forced-air applications. Typical installation scenarios include trunk-to-branch connections, dedicated supply runs, and straight duct extensions in attic, basement, or crawlspace environments. HVAC technicians and sheet metal installers use sections like this to complete or extend existing duct systems during new construction or retrofit projects.
Designed as an OEM-style replacement or standard component for residential and light commercial round duct systems using 4-inch diameter snap-lock galvanized pipe and fittings.
This pipe section is installed by licensed HVAC technicians or qualified sheet metal installers following local mechanical codes and SMACNA duct construction standards. Power down the air handling unit before making any duct connections. Secure joints with sheet metal screws and seal with UL 181-listed mastic or foil tape as required by local code. Avoid crushing or deforming the pipe during handling, as this will restrict airflow and reduce system efficiency.
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