Mm Manufacturing 800-7X6X4 Sheet Metal Wye 7x6x4 Inch

Product Description

The MM Manufacturing 800-7X6X4 is a sheet metal wye fitting used to split a single duct run into two branches within forced-air HVAC systems. The main trunk inlet measures 7 inches, with branch outlets at 6 inches and 4 inches, allowing balanced airflow distribution across two separate zones or rooms. At 1.05 pounds, this fitting is lightweight enough for single-tech installation and durable enough for long-term duct system service. HVAC installers and sheet metal contractors use this wye to tap off main supply trunks or transition airflow at junction points in residential and light commercial ductwork layouts.

This wye fitting is suited for residential new construction, retrofit duct systems, and light commercial forced-air applications where a 7-inch main run needs to branch into 6-inch and 4-inch distribution lines. It fits within standard rectangular and round duct framing configurations and is appropriate wherever airflow needs to be divided at a single junction point without a full plenum transition. Sheet metal contractors and HVAC technicians are the primary installers for this type of fitting.

Key Features

• 7-inch main inlet with 6-inch and 4-inch branch outlets for asymmetric airflow splitting
• Sheet metal construction provides rigidity and compatibility with standard duct sealing methods
• Lightweight at 1.05 pounds for easier overhead and tight-space installation
• 11.5-inch length accommodates standard duct bay spacing
• Fits residential and light commercial forced-air duct systems

Compatibility

Designed as an OEM-style sheet metal wye fitting for use in standard forced-air HVAC duct systems requiring a 7-inch main trunk with 6-inch and 4-inch branch outlets.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with local mechanical codes and SMACNA duct construction standards. Power down the air handler or furnace at the disconnect before working on the duct system. Seal all joints with UL 181-listed mastic or foil tape to meet energy code requirements. Avoid sharp bends or unsupported spans directly adjacent to the fitting outlets, as these reduce airflow efficiency and can cause noise.

Technical Specifications

• Main Inlet Size: 7 inches
• Branch Outlet Sizes: 6 inches and 4 inches
• Length: 11.5 inches
• Width: 6 inches
• Height: 11 inches
• Weight: 1.05 pounds

Standard Information

• Brand: MM Manufacturing
• Manufacturer Part Number: 800-7X6X4