Vaillant elbow 45°, Ø 110/160 mm (2 pieces)

Product detailed description

Vaillant 45° Elbow, Ø 110/160 mm – Pack of 2 Pieces

The 45° directional elbow is a basic directional component of the Vaillant Ø 110/160 mm concentric flue system, supplied in a pack of 2 pieces, as it is most commonly used in pairs when bypassing obstacles (beams, other pipe runs, parapets) – one elbow deflects the route, and the second returns it back to the original direction by the same angle. This combination (a so-called "S-shape") is used, for example, when bypassing a ceiling beam in a horizontal run or when passing through a façade at an angle, where it is not possible to run the route completely straight.

Compared to the 87° elbow, a combination of two 45° elbows represents a gentler change of direction with lower flow resistance of the flue gases, which is particularly advantageous for longer runs where it is necessary to minimize the overall pressure loss of the flue system.

Summary of Technical Parameters

• Part type: 45° elbow (pack of 2 pcs)
• System diameter: Ø 110/160 mm (concentric)
• Direction change angle: 45° (per piece)
• Number of pieces in pack: 2
• Inner pipe material (flue gas): Polypropylene (PP), condensate resistance class W
• Outer casing material (air): UV-stabilized plastic
• Temperature class: T120
• Pressure class: P1
• Joint type: Bayonet lock with rubber seal, rotatable
• Intended for: ecoTEC plus VU 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv
• 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 designed for large-capacity gas condensing boilers with higher nominal output – typically the ecoTEC plus VU 806/5-5, 1006/5-5 and 1206/5-5 range (output range approx. 80 – 120 kW), ecoCRAFT exclusiv and ecoVIT exclusiv modular assemblies, as well as cascade connections of multiple boilers to a common flue collector. The inner pipe, through which the flue gases flow, is made of durable polypropylene (PP) with high temperature and chemical resistance to condensate (condensate resistance class W according to EN 14471); the outer casing that supplies 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 (positive pressure system, suitable for condensing boilers) and corrosion resistance class 1, which corresponds to the standard operating range of flue gases from condensing boilers (low-temperature flue gases, acidic condensate).

The Ø 110/160 mm system is installed exclusively from original Vaillant parts – individual components (extensions, elbows, inspection pieces, roof terminals and fixing 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 locking (bayonet) system, which ensures gas-tightness even over longer pipe lengths and allows for easy installation 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 for most wall-mounted condensing boilers for family houses and apartments (ecoTEC pro/plus range up to approx. 35 – 65 kW), while the Ø 80/125 mm diameter is used for boilers with higher output or for longer runs where lower pressure loss is required. The Ø 110/160 mm diameter, which this part belongs to, is designed for the highest common output segment (ecoTEC plus 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv) and cascade assemblies, where a significantly 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 45° elbows are a universal directional component of the Ø 110/160 mm system, usable with the higher-output ecoTEC plus range, ecoCRAFT exclusiv, ecoVIT exclusiv, and cascade assemblies. Due to their lower pressure loss compared to the 87° elbow, they are preferred for longer runs where it is necessary to conserve the available pressure reserve of the boiler fan to overcome the resistance of the entire route.

Typical Application Scenarios

A typical use case is bypassing a ceiling beam or other pipe run (ventilation, electrical wiring) in a horizontal run in the boiler room, where a straight route is not possible. By combining two 45° elbows (possibly with a short extension between them), the route is slightly deflected around the obstacle and then returned to its original direction, with minimal overall increase in route length compared to bypassing with 87° elbows.

45° elbows are also used for angled routing along a sloped roof or when connecting to a roof penetration at a point where a vertical direction is not possible due to the roof truss structure.

How to Choose Between a 45° and 87° Elbow

Choose a 45° elbow when you only need to slightly deflect the route (for example, to bypass an obstacle and return to the original direction) or route it at an angle, with an emphasis on the lowest possible pressure loss for longer runs. If you need to significantly change the direction of the route, for example from horizontal to vertical (typically at the boiler outlet into a shaft), the correct choice is an 87° elbow (sold separately), or its inspection version.

Installation and Use

45° elbows are inserted into the route similarly to extensions, except that instead of continuing straight, they change direction by 45°. Installation recommendations:

• when bypassing an obstacle (e.g. a ceiling beam), both elbows from the pack are used – the first deflects the route by 45° to one side, the second (installed at a sufficient distance, possibly with a short extension between them) returns it back to the original direction,
• when calculating the total route length for a given boiler, each 45° elbow is counted as a certain equivalent length of straight pipe (usually lower than for the 87° elbow) – the exact value is given in the boiler's installation manual,
• the orientation of the elbow must respect the direction of the slope for condensate drainage – even in an angled section, a minimum slope towards the boiler must be maintained,
• elbows are inserted using a bayonet lock, which also allows for slight rotation of the part to the required plane before final securing.

Safety Notices

Installation and connection of the flue gas system of a condensing boiler may only be carried out by an authorized and trained installation company with professional competence in gas appliances. An incorrectly assembled or leaky flue 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 corresponding diameter and certification – combining 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 on the route (part replacement, service, inspection), a tightness check must be carried out before putting the boiler back into operation.

Maintenance and Care

We recommend checking the flue gas system at least once a year during regular boiler servicing – especially the tightness of the joints, the patency of condensate drainage (if part of the assembly) and mechanical fixing along the entire route. External plastic parts (roof terminals, penetrations) should be visually inspected after the winter season for possible mechanical damage caused by ice or wind. The inside of the pipes does not become clogged with deposits during normal operation the way traditional solid-fuel chimneys do, but the inspection elements in the assembly (inspection elbows, inspection pieces, T-pieces) serve precisely so that a service technician can 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 record of the date of the last tightness check and the condition of the inspection openings – this will make it easier to plan future chimney sweep inspections and provide an overview in the event of a 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 compromise the gas-tightness of the entire assembly or void the boiler warranty. Goods are usually in stock or quickly available from the supplier, so the completion of a boiler room or a service intervention is not delayed due to one 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 normally process orders within one business day and ship items in stock immediately. If you are not sure which exact part your project requires (for example, when combining several lengths and elbows into one route), we will be happy to help you choose the correct assembly before ordering – just send us a floor plan or a photo of the installation site and information about the boiler model.

Frequently Asked Questions