Flue Adaptor WADEX ADAPTOR FLUE D170/150 — concentric reducer 170 mm to 150 mm

WADEX ADAPTOR FLUE D170/150 is a concentric reducer created to connect flue systems with different diameters, providing a sealed transition from 170 mm to 150 mm. Designed for use with gas appliances, boilers and chimneys, this adaptor enables correct alignment of concentric ducting and helps maintain secure exhaust routing in ventilation and flue installations.

Advantages

The adaptor offers a precise concentric reduction that preserves the integrity of the flue path and minimizes leakage at the joint. Constructed to fit standard circular ducts, it facilitates quick installation and provides stable mechanical connection between two pipe sizes without the need for extensive modification. Its design supports safe exhaust flow and helps maintain compliance with installation requirements where a step-down in diameter is necessary.

Suitable for

• Connecting concentric flue pipes from 170 mm to 150 mm in residential or commercial boiler installations
• Adapting exhaust ducts for gas appliances and water heaters
• Repair or modification of existing ventilation and chimney systems requiring a diameter reduction

When it may not be suitable

This concentric reducer is intended specifically for 170 mm to 150 mm concentric duct connections; it is not suitable where different diameters, non-concentric transitions, or rectangular ducting are required. It should not be used as the sole sealing solution in systems that demand additional certified sealing or insulation to meet local codes.

Key specifications

• Type: concentric flue reducer
• Input diameter: 170 mm (outer connection for concentric duct)
• Output diameter: 150 mm (inner connection for concentric duct)
• Function: sealed diameter reduction for exhaust and ventilation systems
• Application: suitable for gas appliance and boiler flue connections, chimneys, and ventilation ducts

How to use

Ensure both mating ducts are clean, undamaged and correctly aligned before fitting the adaptor. Slide the adaptor over or into the corresponding concentric ducts according to the system’s connection style, then secure the joints using the appropriate clips, clamps or fasteners recommended for the flue material. Check for a tight fit and verify the exhaust path is unobstructed. Follow appliance and local installation regulations regarding clearances, support and sealing; if required, apply compatible sealing materials or gaskets to maintain a gas-tight connection.

What to consider before purchase

• Confirm the existing flue or duct diameters are 170 mm and 150 mm and that the system uses concentric pipe geometry
• Verify material compatibility with your ducts and the recommended fasteners or seals for your installation
• Check local codes and appliance manufacturer instructions to ensure this type of reducer is acceptable for your installation

Usage recommendations

Install the adaptor as part of a complete flue system inspection: verify clearances, supports and seals after installation and perform a leak check according to applicable safety standards. Where uncertainty exists, consult a qualified heating or ventilation installer to confirm correct selection and safe integration into the exhaust system.