Atco Rubber Products C Flexible Air Duct 4 in X 50 Ft

Product Description

The ATCO RUBBER PRODUCTS C is a 4-inch diameter, 50-foot silver uninsulated flexible air duct designed for low-pressure air distribution in residential and light commercial HVAC systems. This duct serves as a connector between rigid ductwork, plenums, diffusers, and grilles, routing conditioned air through finished and unfinished spaces. The uninsulated construction keeps the profile lightweight and easy to route in unconditioned areas where thermal loss is managed by other means. HVAC technicians and sheet metal contractors are the primary installers for this product.

This flexible duct is suited for supply and return air applications in forced-air heating and cooling systems. Common installation scenarios include connecting air handlers to branch runs, spanning short distances between rigid trunk lines and diffusers, and fitting into tight attic or crawl space runs where rigid duct is impractical. The 50-foot length provides enough material for multiple branch drops from a single coil, reducing waste on standard residential jobs.

Key Features

• 4-inch diameter accommodates standard small-branch supply runs
• 50-foot coil length supports multiple branch connections per roll
• Uninsulated design keeps weight low and simplifies routing in conditioned or enclosed spaces
• Silver outer jacket provides a clean, finished appearance and light resistance to abrasion
• Flexible construction bends and routes around framing, joists, and obstacles without rigid fittings

Compatibility

Designed as an OEM-style replacement and general-use flexible duct for standard 4-inch residential HVAC branch supply and return applications.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and SMACNA flexible duct installation guidelines. Power down the air handler and confirm the system is de-energized before connecting or disconnecting any ductwork. Secure each end with an approved clamp and mastic or UL-listed foil tape rated for duct use — do not use standard cloth-backed tape. Avoid sharp bends that reduce airflow or create back-pressure in the branch run.

Technical Specifications

• Diameter: 4 inches
• Length: 50 feet
• Insulation: Uninsulated
• Jacket Color: Silver

Standard Information

• Brand: ATCO RUBBER PRODUCTS
• Manufacturer Part Number: C