Lukjan rx77040504 Adjustable Flue Wye 5x4x4

Product Description

The LUKJAN rx77040504 is an adjustable flue wye fitting used in venting systems to split or combine flue gas flow across multiple vent runs. The 5 x 4 x 4 inch configuration accommodates a 5-inch main flue inlet with two 4-inch branch outlets, making it a practical choice for residential and light commercial heating appliance venting. The adjustable design allows the installer to set the branch angle to suit the routing requirements of the specific installation. HVAC technicians and sheet metal mechanics install this type of fitting as part of B-vent or single-wall metal vent assemblies serving gas-fired furnaces, boilers, and water heaters.

This fitting is suited for flue venting applications where a single main vent run must be split into two branch lines, or where two branch lines are being combined into one main vent. Typical installations include multi-appliance venting scenarios in residential mechanical rooms and utility spaces. The 5-inch main by dual 4-inch branch sizing is common in standard residential gas heating vent systems. This product falls within the tees and wyes category of flue venting components.

Key Features

• Adjustable branch angle for flexible routing in tight or irregular spaces
• 5-inch main opening with two 4-inch branch openings for multi-run venting
• Designed for flue venting applications on gas-fired heating equipment
• Wye configuration reduces turbulence compared to sharp tee branches

Compatibility

Designed as an OEM-style flue venting component for use in single-wall metal vent assemblies serving residential and light commercial gas-fired heating appliances where a 5-inch main and dual 4-inch branch configuration is required.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal mechanic in accordance with local mechanical codes and the appliance manufacturer venting requirements. Shut down and allow the connected heating appliance to cool completely before working on any flue venting components. Secure all joints with the appropriate fasteners and seal as required by the applicable code. Verify that the completed venting assembly maintains the minimum clearances to combustibles specified by the appliance listing and local authority having jurisdiction.

Technical Specifications

• Main Inlet Size: 5 inches
• Branch Outlet Size: 4 inches (x2)
• Type: Adjustable Flue Wye
• Category: Tees and Wyes

Standard Information

• Brand: LUKJAN
• Manufacturer Part Number: rx77040504