Southwark Metal 1146128 Horizontal 90 Degree Elbow

Product Description

The SOUTHWARK METAL 1146128 is a horizontal 90-degree rectangular elbow duct fitting designed for sheet metal HVAC ductwork systems. It measures 12 x 8 x 3 inches and provides a square-turn direction change in horizontal duct runs. This fitting connects straight duct sections where airflow must turn 90 degrees without a rise or drop in elevation. It is fabricated from sheet metal and is intended for use in forced-air heating and cooling distribution systems. HVAC sheet metal mechanics and duct installers use this fitting during new construction and retrofit projects requiring precise directional changes in supply or return air pathways.

This horizontal elbow is suited for residential and light commercial forced-air duct systems where a 90-degree turn in the horizontal plane is required. The 12 x 8 x 3 inch profile fits standard rectangular duct configurations of that face dimension. It is typically installed in tight mechanical rooms, crawlspaces, basements, or above-ceiling plenum spaces where space constraints require a sharp directional change. The BW designation indicates a box-width style construction consistent with standard industry duct fabrication practices.

Key Features

• 90-degree horizontal elbow for flat-plane directional changes in rectangular duct systems
• 12 x 8 x 3 inch dimensions for standard rectangular duct connections
• Sheet metal construction for durability in forced-air HVAC applications
• BW-style fitting designed for compatibility with standard rectangular ductwork profiles
• Suitable for both supply and return air duct configurations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard rectangular sheet metal ductwork systems requiring a 12 x 8 inch face dimension horizontal 90-degree elbow.

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. The HVAC system should be powered down and the air handler shut off before modifying or connecting ductwork. Secure all joints with sheet metal screws and seal with UL 181-rated mastic or foil tape to maintain system efficiency and prevent air leakage. Do not overtighten fasteners on flanged connections, as this can deform the fitting and compromise the seal.

Technical Specifications

• Fitting Type: Horizontal 90 Degree Elbow
• Duct Shape: Rectangular
• Dimensions: 12 x 8 x 3 inches
• Construction Style: BW (Box Width)
• Material: Sheet Metal

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 1146128