Imperial 4 in. Galvanized Starter Collar – 1 Each

Overview

The Imperial 4 in. Galvanized Starter Collar is engineered to simplify duct connections in both residential and light commercial HVAC projects. This collar provides a reliable entry point for flexible ducting, enabling a clean transition from the main trunk to branch runs while keeping a tidy, professional finish.

Durable, galvanized construction

With galvanized construction, the collar resists corrosion in challenging environments such as attics, basements, and crawl spaces. The zinc coating helps protect the connection point as ducts are assembled or adjusted, supporting long‑lasting performance in everyday use.

Key specifications

• Size: 4 inches in diameter for standard flexible duct
• Connector type: designed to connect flexible duct to the main trunk line
• Finish: galvanized for durability and longevity
• Origin: made in Canada

Compatibility and performance

The 4 in. starter collar matches standard flexible duct and trunk line sizes, making it a practical choice for common HVAC layouts. Proper fit, combined with standard clamps and sealant, helps support steady airflow and a clean junction in practical installations.

Practical uses and scenarios

Use this starter collar when branching a flexible duct from the main trunk in retrofit or new construction projects. It offers a straightforward path for air to move from trunk to branch, helping maintain balanced airflow across runs.

• Attic or utility room installations where space is tight
• Basement duct runs requiring secure, quick connections
• New builds where a dependable trunk-to-duct junction speeds up installation
• Retrofits and renovations that need a straightforward, economical connector

Installation notes and tips

Prepare the main trunk and flex duct with standard fasteners and clamps. Align the 4 in. collar with the trunk opening, apply sealant or tape as needed, and secure with appropriate hardware. A properly installed collar creates a clean junction that supports efficient airflow and reduces potential air leakage when used correctly.

Why choose Imperial

Imperial offers practical HVAC components crafted with attention to reliability. This starter collar provides a simple, sturdy option for connecting flexible duct to a main line, helping you complete installations efficiently without compromising fit or finish. Made in Canada, this part reflects a commitment to quality and consistency across projects.