Chimney Union Tee WADEX 125 mm diameter, 120/15 connection

Chimney Union Tee WADEX 125 mm diameter, 120/15 connection is a specialised flue component designed to join and divert exhaust gases within chimney systems. The tee provides a stable junction with a main 125 mm bore and a 120/15 branch connection, enabling inspection, cleaning access or a controlled branch for secondary ducting. Built for residential and light-commercial heating installations, this WADEX tee is intended for systems that require these exact connection dimensions and supports both gravity and forced-draft ventilation arrangements.

Advantages

The union tee offers a compact and durable junction that simplifies installation and maintenance of chimney runs. Its matched diameters ensure a tight fit and reliable gas flow management, while the branch connection provides convenient access for removal of soot and condensate or for integrating additional flue components. The design reduces the need for complex fittings and supports standard chimney inspection and cleaning procedures.

Suitable for

• Residential heating systems with a 125 mm main flue and 120/15 branch requirement
• Light-commercial boilers and furnaces requiring a detachable inspection point
• Gravity or forced-draft ventilation chimney configurations
• Installations where periodic cleaning or flue inspection access is needed

Key specifications

• Main internal diameter: 125 mm
• Branch connection dimensions: 120/15
• Function: union tee for joining, diverting and providing inspection/cleaning access
• Application: suitable for gravity and forced-draft flue systems in residential and light-commercial settings

How to use

Install the chimney union tee inline with matching 125 mm flue sections, ensuring that the 120/15 branch aligns with the required inspection or auxiliary duct. Follow the chimney manufacturer's instructions and applicable local codes for jointing, sealing and support. Use appropriate clamps, seals or gaskets where indicated to maintain gas-tight connections and correct slope. After installation, verify the integrity of joints and perform a smoke or pressure test if required by local regulations.

Usage recommendations

Regularly inspect the branch access and main bore for soot accumulation and condensate. Schedule cleaning and inspection intervals according to fuel type and operating conditions, and engage qualified service personnel for any repairs or modifications that affect flue integrity.