Vaillant flue extension 0.5 m, Ø 110/160 mm

Product detailed description

Vaillant flue extension 0.5 m, Ø 110/160 mm

This extension pipe with a length of 0.5 m is a basic building block of the Vaillant concentric flue system Ø 110/160 mm. It is used to bridge the distance between the boiler (or the manifold in a cascade connection) and the flue gas outlet point – a roof terminal or shaft connection. By combining several extensions of different lengths (0.5 m, as well as 0.5 m / 1.0 m / 2.0 m variants) and bends, an exact route can be designed according to the layout of a specific boiler room or plant room, without any need for cutting or on-site modification of the pipes.

The pipe consists of two coaxial shells – an inner one through which the flue gases flow, and an outer one through which combustion air is supplied to the boiler from the outlet location. Both ends are equipped with a bayonet lock with a seal, allowing quick and gas-tight connection to adjacent parts (further extension, bend, inspection piece, or direct connection to the boiler) without the need for gluing or welding.

Technical parameters summary

• Part type: Extension (straight pipe)
• System diameter: Ø 110/160 mm (concentric)
• Length: 0.5 m
• Inner pipe material (flue gases): Polypropylene (PP), condensate resistance class W
• Outer shell material (air): UV-stabilized plastic
• Temperature class: T120
• Pressure class: P1
• Joint type: Bayonet lock with rubber seal (on both ends)
• Orientation: Universal – horizontal and vertical
• Intended for: ecoTEC plus VU 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv, cascade systems
• Country of origin: Germany / EU
• Brand: Vaillant
• Warranty: 24 months

Vaillant Ø 110/160 mm flue gas system

The pipe system with a diameter of Ø 110/160 mm belongs to the family of Vaillant concentric (coaxial) flue systems intended for high-capacity gas condensing boilers with higher rated output – typically the ecoTEC plus VU 806/5-5, 1006/5-5 and 1206/5-5 range (output range approx. 80 – 120 kW), modular systems ecoCRAFT exclusiv and ecoVIT exclusiv, as well as cascade connections of several boilers to a common flue manifold. The inner pipe, through which the flue gases flow, is made of durable polypropylene (PP) with high thermal and chemical resistance to condensate (condensate resistance class W according to EN 14471), the outer shell supplying combustion air is made of UV-stabilized plastic or aluminium depending on the specific part. The system is certified for temperature class T120, pressure class P1 (pressurized system, suitable for condensing boilers) and corrosion class 1, which corresponds to the normal operating range of flue gases from condensing boilers (low-temperature flue gases, acidic condensates).

The Ø 110/160 mm system is assembled exclusively from original Vaillant parts – individual components (extensions, bends, inspection pieces, roof terminals and mounting elements) are combined into an assembly precisely according to the layout of the specific boiler room or plant room. All joints are sealed with a silicone seal with a bayonet locking system, which guarantees gas-tightness even with longer pipe runs and allows easy assembly and disassembly without the need for gluing or welding.

Comparison with other Vaillant flue system diameters

Vaillant offers concentric flue systems in several diameters depending on boiler output – the smallest common diameter Ø 60/100 mm is used with most wall-mounted condensing boilers for family homes and apartments (ecoTEC pro/plus range up to approx. 35 – 65 kW), the Ø 80/125 mm diameter is used with higher-output boilers or longer runs where lower pressure loss is required. The Ø 110/160 mm diameter, which this part belongs to, is intended for the highest common output segment (ecoTEC plus 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv) and cascade systems, where a substantially larger volume of flue gases needs to be discharged. Parts of different diameters are not interchangeable – it is therefore always necessary to verify the exact system diameter on your boiler or in the project documentation before ordering.

Compatibility with boiler models

The 0.5 m extension is a universal building block of the Ø 110/160 mm system, usable with all models that use this flue diameter – ecoTEC plus in the higher output range (806/5-5, 1006/5-5, 1206/5-5), modular boiler plants ecoCRAFT exclusiv and ecoVIT exclusiv, as well as cascade connections with multiple boilers on a common manifold. The 0.5 m length is in practice most often combined with the other available lengths (0.5 / 1.0 / 2.0 m) so that the sum exactly matches the actual route from the boiler to the flue gas outlet point.

Typical usage scenarios

The 0.5 m extension is used wherever a specific section of the route between the boiler (or the previous part of the assembly) and the next element – another extension, bend, inspection piece or terminal outlet – needs to be bridged. When designing the route, the total required length is usually first determined according to the boiler room layout, and this length is then assembled from the available 0.5 m variant together with the other lengths so that it matches the actual on-site conditions to an accuracy of tens of centimeters, without any need to cut the pipes.

The estimated weight of this part (approx. 1.0 – 1.5 kg) corresponds to normal handling load for one person during installation, but for a larger number of connected pieces in one vertical branch, the total weight of the route must always be taken into account when designing supports and anchoring.

How to choose the correct extension length

Choose the 0.5 m length if you need to bridge a section of the route corresponding exactly to this distance, or if you will combine it with other lengths (1.0 m and 2.0 m) to achieve an exact total matching the actual route in your boiler room. We recommend measuring the actual route on site (from the boiler outlet to the planned flue gas outlet point) before ordering, and only then choosing the combination of lengths and bends that most accurately covers this distance without the need to cut the pipes.

Installation and use

The 0.5 m extension is inserted into the flue gas route at any point between the boiler and the terminal outlet (roof terminal, wall sleeve or shaft connection). During installation:

• the pipe is pushed into the previous part using the bayonet lock all the way to the stop – correct insertion is indicated by an audible/tangible click of the latch,
• the direction of condensate flow must always have a slight slope towards the boiler (or towards the condensate collection point), so that condensate does not accumulate at the wrong point in the route,
• for longer vertical or horizontal sections (including this extension), the pipe must be continuously supported with mounting clamps or brackets at intervals according to the manufacturer's installation instructions, typically every 1 – 1.5 m,
• the maximum total route length (sum of all extensions and equivalent bend lengths) is limited by the installation instructions for the specific boiler model – we recommend verifying the maximum allowed range before ordering multiple pieces.

The pipe can be used for both horizontal and vertical sections of the route, or in combination with bends also for diagonal routing.

Safety warnings

Installation and connection of the condensing boiler flue system may only be carried out by an authorized and trained installation company with professional qualification for gas appliances. An incorrectly assembled or leaking flue gas route can lead to the leakage of flue gases (including carbon monoxide) into living spaces, which poses a serious health risk. Use only original Vaillant parts of the appropriate diameter and certification – combination with parts from other manufacturers or of other diameters is not permitted and violates the conditions of the CE certification of the entire assembly as well as the boiler warranty. After any intervention in the route (part replacement, service, inspection), a leak-tightness check must be carried out before putting the boiler back into operation.

Maintenance and care

We recommend having the flue system inspected at least once a year during regular boiler servicing – especially the tightness of joints, the patency of condensate drainage (if part of the assembly) and mechanical fastening along the entire route. The outer plastic parts (roof terminals, sleeves) should be visually inspected after the winter season for possible mechanical damage from ice or wind. The inside of the pipes does not become fouled with deposits during normal operation as classic solid-fuel chimneys do, but the inspection elements in the assembly (inspection bends, inspection pieces, T-pieces) allow a service technician to easily look inside the pipe during inspection and clean it if necessary without having to dismantle the entire route.

For boilers with a longer flue route, we recommend keeping a simple service log of the date of the last leak-tightness check and the condition of the inspection openings – this will make it easier to plan further chimney sweep inspections and provide an overview in case of a warranty claim or property sale.

Why buy this part at Atria.sk

We offer exclusively original Vaillant parts with 100% compatibility with this brand's flue systems – no universal replacements of questionable quality that could jeopardize the gas-tightness of the entire assembly or void the boiler warranty. The goods are usually in stock or quickly available from the supplier, so the completion of the boiler room or a service intervention is not delayed by a single missing part. If you are unsure which exact part you need for your assembly, we will be happy to advise you by phone or email – just provide the boiler model and the length of the flue route you need to bridge.

We process orders within one business day as standard, and items in stock are dispatched immediately. If you are not sure which exact part your project requires (for example when combining several lengths and bends into one route), we will gladly help you choose the correct assembly before ordering – just send us a floor plan or a photo of the installation location and information about the boiler model.

Frequently asked questions