Chimney Union Tee WADEX 125 mm diameter – model 180/20

Chimney union tee WADEX 125 mm diameter – model 180/20 is a metal T-shaped fitting designed to join and branch round chimney flue sections with a 125 mm internal diameter. It creates a stable junction in flue and ventilation systems, allowing connection of an auxiliary pipe or access for inspection and cleaning. The fitting is intended for use in heating appliances and chimney assemblies where a 125 mm flue size is specified and a durable metal connection is required.

Advantages

The WADEX chimney union tee provides a reliable, compact solution for creating a T-connection in round flue systems. Its metal construction ensures mechanical strength and resistance to deformation under normal operating temperatures. The design facilitates straightforward integration with standard 125 mm flue sections, and the tee supports inspection and maintenance access without requiring major disassembly of the airway. The unit is compatible with common chimney and ventilation installations that use round ducting of the specified diameter.

Suitable for

• Branching a 125 mm round chimney or flue
• Connecting an auxiliary inspection or cleaning opening
• Integration into heating appliance exhaust systems
• Ventilation ducting requiring a T-shaped metal junction

Key specifications

• Nominal internal diameter: 125 mm
• Shape: T-shaped (union tee) for round flue sections
• Material: metal construction suitable for chimney and ventilation use
• Application: for joining and branching flue or exhaust ducts
• Compatibility: designed for round flue systems with 125 mm diameter

How to use

Install the WADEX chimney union tee by aligning the tee’s sockets with the ends of the existing 125 mm round flue sections. Ensure mating ends are fully seated and, where appropriate, secure joints using the recommended fastening or sealing method for the rest of the flue system (for example, clamps, sealant, or mechanical fasteners compatible with metal chimney components). Use the branch opening for connecting an auxiliary pipe or for inspection access; confirm that all connections maintain proper slope and draft as required by local installation standards and appliance manufacturer instructions.

Usage recommendations

Verify compatibility with local building and chimney regulations before installation. Ensure the chimney is cold and the appliance is turned off during installation. Where required, use appropriate high-temperature sealants or clamps and follow safety guidelines for working on heating systems. Periodically inspect the tee and adjoining flue sections for soot accumulation, corrosion or damage and perform cleaning or maintenance as needed to maintain safe operation.