Optimize the flue gas evacuation of your heating system with the 200 to 150 mm vitreous enameled sleeve , an essential plumbing and metalwork accessory that ensures a leak-proof, safe, and durable connection between pipes of different diameters. Specifically designed to withstand high temperatures and the corrosive effects of combustion gases, this reducing sleeve offers exceptional thermal performance in wood-burning stoves, pellet stoves, traditional fireplaces, and biomass boilers.

Manufactured from high-quality steel and coated with a vitreous enamel finish inside and out, this component offers superior resistance to rust, thermal shock, and acidic condensate generated during combustion. Its black vitreous enamel finish not only ensures a long lifespan without compromising its structural integrity but also provides a clean, professional aesthetic that blends seamlessly into any decorative or technical installation.

The main function of this component is to allow a smooth transition from a 200 mm main flue to a 150 mm flue, maintaining the system's airtight seal at all times and preventing carbon monoxide or smoke leaks into the room. Its precision design facilitates a perfect fit between the chimney pipes, optimizing draft and improving the overall energy efficiency of the heating system.

Main Features

• Product type: Vitrified reducing sleeve for chimney pipe and flue.


• Manufacturer reference: B10804801.


• Inlet diameter: 200 mm.


• Outlet diameter: 150 mm.


• Manufacturing material: High-strength steel with double-layer vitreous enamel coating.


• Thermal resistance: High tolerance to extreme temperatures and resistance to continuous fire.


• Corrosion protection: Immune to the action of acid condensates and soot.


• Color: High aesthetic durability vitrified black.


• Application: Chimneys, stoves, boilers and residential and industrial flue systems.

Frequently Asked Questions

What exactly is this vitrified reducing sleeve used for?

This coupling is used to securely connect two chimney pipes of different diameters, reducing the outlet from 200 mm to 150 mm. It is ideal when the flue outlet of the heating appliance does not match the diameter of the installed exhaust duct, or vice versa.

Is it compatible with pellet stoves and wood-burning fireplaces?

Yes, this sleeve is designed to withstand the thermal demands of wood stoves, pellet stoves, metal fireplaces and biomass boilers, easily withstanding high temperatures and sudden temperature changes.

What advantages does vitrified coating offer compared to other finishes?

The vitreous enamel protects both the interior and exterior of the pipe against corrosion caused by acidic condensate and soot. It also provides a smooth surface that prevents excessive residue buildup and offers a sleek, black finish.

How is this component installed?

The sleeve fits directly between the pipe sections corresponding to diameters of 200 mm and 150 mm. It is recommended to secure the joints with refractory sealant or specific flue clamps to ensure a complete seal and prevent any leaks.