Vaillant flue inspection piece, Ø 110/160 mm

Product detailed description

Vaillant Inspection Section Ø 110/160 mm

The inspection section is a straight length of pipe fitted with a side removable inspection cover (inspection door), which allows access to the inside of the flue system without having to dismantle the surrounding joints. It is installed at points along the route where, for operational reasons, regular access is needed for checking tightness, patency, and cleaning if necessary – typically before entering a shaft, on longer horizontal sections before the roof outlet, or in boiler rooms with several boilers connected in cascade.

In terms of applicable legislation (STN EN 15287 and related regulations on regular inspection of chimneys and flue systems), inspection openings are often a mandatory part of longer or more complex runs – installing them at the design stage prevents additional complications at the first chimney sweep inspection.

Technical Parameters Summary

• Part type: Inspection section (straight, with inspection cover)
• System diameter: Ø 110/160 mm (concentric)
• Inner pipe material (flue gases): Polypropylene (PP), condensate resistance class W
• Outer casing material (air): UV-stabilised plastic
• Inspection cover: Removable, with seal
• Temperature class: T120
• Pressure class: P1
• Joint type: Bayonet lock with rubber seal
• 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 Flue System Ø 110/160 mm

The pipe system with a diameter of Ø 110/160 mm belongs to the family of concentric Vaillant flue systems designed for large-capacity gas condensing boilers with higher rated output – typically the ecoTEC plus VU 806/5-5, 1006/5-5 and 1206/5-5 series (output range approx. 80 – 120 kW), modular ecoCRAFT exclusiv and ecoVIT exclusiv assemblies, as well as cascade configurations of several boilers connected to a common flue manifold. 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), while the outer casing carrying the combustion air is made of UV-stabilised 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 typical operating range of flue gases in condensing boilers (low-temperature flue gases, acidic condensate).

The Ø 110/160 mm system is installed exclusively using original Vaillant parts – individual components (extensions, elbows, inspection sections, 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 using a locking (bayonet) system, which guarantees gas-tightness even with longer pipe runs and allows for 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 houses and flats (ecoTEC pro/plus series 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 intended for the highest common output segment (ecoTEC plus 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv) and cascade assemblies, where a considerably larger volume of flue gas needs to be discharged. Parts of different diameters are not interchangeable – it is therefore always necessary to verify the exact system diameter for your boiler or in the project documentation before ordering.

Compatibility

The inspection section is compatible with all assemblies of the Ø 110/160 mm system regardless of the specific model – higher-output ecoTEC plus series, ecoCRAFT exclusiv, ecoVIT exclusiv, as well as cascade configurations with multiple boilers. It is recommended to include it in the design wherever the run does not have another natural inspection option (for example, a T-piece with a built-in inspection opening).

Typical Use Scenarios

The inspection section is typically included in the run before entering a vertical shaft or before a longer hidden section routed through a suspended ceiling, where without it a chimney sweep or service inspection could not be carried out without partial dismantling of the structure. In multi-boiler plant rooms, inspection sections are usually placed on each branch before it connects to the common manifold, so that each branch can be inspected and, if necessary, cleaned separately during servicing.

When to Choose a Separate Inspection Section Instead of an Inspection Elbow

Choose a separate inspection section when you need inspection access in a straight section of the run without a change of direction – for example, on a longer horizontal section before entering a shaft or before the roof outlet. If you need inspection access exactly where the run also changes direction by 87°, it is more advantageous to choose an inspection elbow, which combines both functions in a single part, saving space and reducing the number of joints.

Installation and Use

The inspection section is inserted into the run in the same way as a standard extension, with the orientation of the inspection cover having to remain permanently accessible after installation is complete. Recommendations:

• when designing the route, choose the location of the inspection section so that permanent physical access to it is ensured (not behind a permanently fixed cladding without a door),
• if the run passes through a suspended ceiling or false wall, an inspection door must be installed at this point in the ceiling/wall itself, corresponding to the position of the inspection cover,
• during normal operation the inspection cover is left closed and is only opened for service inspection or chimney sweep inspection,
• after each opening, check the condition of the cover seal and clean it of any dirt or condensate before closing it again.

Safety Notices

Installation and connection of the condensing boiler's flue system may only be carried out by an authorised and trained installation company with the relevant qualifications for gas appliances. An incorrectly assembled or leaking flue run can lead to the escape of flue gases (including carbon monoxide) into living spaces, which poses a serious health risk. Use only original Vaillant parts of the correct diameter and certification – combining them with parts from other manufacturers or of different diameters is not permitted and is contrary to the CE certification conditions of the entire assembly as well as the boiler warranty. After any intervention in the run (part replacement, servicing, inspection), a 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 the regular boiler service – in particular the tightness of joints, the patency of the condensate drain (if part of the assembly), and the mechanical fixing along the entire run. The outer plastic parts (roof terminals, wall sleeves) should be visually inspected after the winter season for possible mechanical damage caused by ice or wind. Unlike traditional solid-fuel chimneys, the inside of the pipes does not normally accumulate deposits during regular operation, but the inspection elements in the assembly (inspection elbows, inspection sections, T-pieces) allow a service technician to easily look inside the pipe during an inspection and clean it if necessary, without having to dismantle the entire run.

For boilers with a longer flue run, we recommend keeping a simple service record of the date of the last tightness check and the condition of the inspection openings – this makes it easier to plan future chimney sweep inspections and provides a useful 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 dubious universal replacements that could jeopardise the gas-tightness of the entire assembly or invalidate the boiler warranty. Goods are usually in stock or quickly available from the supplier, so the completion of a boiler room installation or a service intervention is not held up 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 let us know the boiler model and the length of the flue run 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 run), we will be happy to help you choose the correct assembly before you order – just send us a floor plan or a photo of the installation location along with the boiler model.

Frequently Asked Questions