Mm Manufacturing 400-10X8 Tapered Reducer 10x8 in Duct

Product Description

The MM MANUFACTURING 400-10X8 is a tapered duct reducer designed to transition airflow between two different duct sizes within a forced-air HVAC system. The tapered profile creates a smooth, gradual reduction from a 10-inch opening to an 8-inch opening, which helps maintain airflow velocity and reduces turbulence at the transition point. At 0.8 pounds, this is a lightweight fitting that handles quickly on the job. HVAC technicians and sheet metal installers use this type of fitting when downsizing trunk lines, connecting supply branches, or adapting between mismatched duct sections during new installation or retrofit work.

This tapered reducer is suited for residential and light commercial forced-air ductwork systems. It is appropriate for supply and return air applications where a smooth cross-section change is needed between round or rectangular duct runs. The 400 series is available in 42 size combinations ranging from 4 x 3 inches up to 24 x 22 inches, making it part of a broad family of fittings for common duct sizing scenarios encountered in the field.

Key Features

• Tapered profile reduces turbulence and pressure loss at the duct transition
• Transitions from a 10-inch inlet to an 8-inch outlet
• Lightweight at 0.8 pounds for fast handling and installation
• Part of the 400 series with 42 available size combinations from 4 x 3 inches to 24 x 22 inches
• Suitable for supply and return air duct applications in residential and light commercial systems

Compatibility

Designed as an OEM-style ductwork fitting for residential and light commercial forced-air HVAC systems requiring a tapered transition between 10-inch and 8-inch duct sections.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal installer. Power down the air handling unit and confirm the system is de-energized before working in the duct system. Secure the fitting with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape in accordance with local mechanical codes. Do not overtighten fasteners, as this can distort the fitting and compromise the seal.

Technical Specifications

• Inlet Size: 10 inches
• Outlet Size: 8 inches
• Length: 10 inches
• Width: 10 inches
• Height: 8 inches
• Weight: 0.8 pounds

Standard Information

• Brand: MM MANUFACTURING
• Manufacturer Part Number: 400-10X8