The 150 to 120 mm vitreous enameled sleeve is an essential plumbing and heating fitting for ensuring a perfect, safe, and airtight connection in flue systems. Specifically designed to act as a chimney pipe reducer , this fitting allows for the efficient connection of pipes of different diameters, optimizing the draft and performance of stoves, fireplaces, and biomass or wood-burning boilers.

Manufactured with top-quality materials, this sleeve features an exterior and interior vitreous enamel coating that provides exceptional resistance to continuous high temperatures, corrosion, and acidic condensate generated during combustion. Its smooth finish not only facilitates easy cleaning and maintenance but also prevents the accumulation of soot and residue, ensuring optimal gas flow and a long service life for the entire flue system.

Features of the Vitrified Reducing Sleeve 150-120 mm

• Product reference: B10804780.


• Component type: Reducing sleeve / Chimney pipe reducer.


• Connection diameters: Precise transition from 150 mm to 120 mm.


• High-strength material: Robust steel with long-lasting vitreous enamel coating.


• Thermal resistance: Withstands extreme temperatures without suffering deformation or loss of properties.


• Corrosion protection: High tolerance to oxidation, acid gases and combustion condensates.


• Non-stick surface: Vitrified interior finish that minimizes soot adhesion and facilitates maintenance.


• Secure installation: Designed for a firm and airtight connection between flue gas exhaust ducts.

Frequently Asked Questions about Chimney Pipe Reducers

What exactly is this vitrified sleeve used for?

This component serves to reduce the diameter of the exhaust duct, allowing a 150 mm chimney or stove outlet to be connected to a 120 mm exhaust pipe (or vice versa, depending on the mounting configuration), always maintaining a tight and secure connection that prevents leaks of gases and smoke to the outside.

Is it compatible with any type of stove or fireplace?

The sleeve is universal for systems that operate with the specified diameters of 150 mm and 120 mm. It is ideal for wood-burning stoves, inserts, boilers, and metal fireplaces, provided that current regulations for flue installation are respected.

How does vitrified coating withstand high temperatures?

The vitrified treatment fuses to the steel at high temperatures, creating a protective vitrified layer that perfectly withstands the intense heat and thermal shocks typical of chimney operation, preventing premature oxidation and wear of the base metal.

Does it require any special maintenance?

Thanks to the smooth, non-porous surface of the vitreous enamel, soot and residue encounter much less friction to adhere to. Maintenance is reduced to the mandatory periodic inspections and cleaning of the chimney, as it is a very easy material to clean.