Duc-pac 90020 4 Inch 30 Gauge Smoke Pipe Round 90 Elbow

Product Description

The DUC-PAC 90020 is a 90-degree round elbow fabricated for smoke pipe duct systems in forced air heating applications. Formed from 30-gauge sheet metal, this fitting provides a sharp directional change in single-wall smoke pipe runs. At 4 inches in diameter, it fits standard round pipe sections used in residential and light commercial installations. HVAC technicians and sheet metal installers use this elbow to route flue or duct sections around structural obstacles or to transition between vertical and horizontal runs within a system layout.

This elbow is suited for forced air duct and smoke pipe installations where a 90-degree turn is required in a 4-inch round pipe run. It is a prefabricated fitting intended to be integrated into new construction or retrofit ductwork. It is appropriate for residential heating system exhaust and duct routing applications that call for standard round single-wall fittings.

Key Features

• 90-degree elbow configuration for sharp directional changes in round pipe runs
• 4-inch diameter fits standard round smoke pipe sections
• 30-gauge sheet metal construction
• Prefabricated fitting for consistent sizing and fit in the field
• Designed for use in forced air heating and smoke pipe systems

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 4-inch round single-wall smoke pipe and forced air duct systems.

Installation Notes

Installation should be performed by a qualified HVAC technician or licensed sheet metal installer in accordance with local mechanical codes and NFPA 211 where applicable. Shut down and de-energize the heating system before making any connections to the duct or flue pipe run. Secure all joints with approved fasteners and seal as required by the applicable code for the system type. Do not use this fitting in applications that exceed its rated gauge or diameter without verifying fitment with the manufacturer.

Technical Specifications

• Diameter: 4 inches
• Gauge: 30
• Configuration: 90-degree round elbow
• Material: Sheet metal

Standard Information

• Brand: DUC-PAC
• Manufacturer Part Number: 90020