Vaillant flue extension Ø130 mm, length 2.0 m

Product detailed description

Vaillant flue extension Ø130 mm, length 2.0 m

The two-metre straight flue extension Ø130 mm is a longer variant of the basic component of the Vaillant flue system for condensing boilers, designed primarily to span longer straight sections of the flue path - typically in taller chimney shafts, longer horizontal runs led through a plant room or technical floor, or in cascade boiler rooms where the collection run connects several boilers over a greater distance. Made of polypropylene (PP) resistant to condensate and to the temperatures of flue gases from condensing operation, this component is part of a comprehensive range of Ø130 mm accessories, which also includes shorter 1.0 m extensions, elbows of various angles, an inspection T-piece, connection and extension sets (S1, S2, S3) and spacer brackets.

Technical characteristics

• Nominal diameter: Ø130 mm
• Length: 2.0 m
• Material: polypropylene (PP), resistant to condensate and to the temperatures of flue gases from condensing operation
• Operation type: pressurised (type C), suitable for condensing boilers with forced flue gas extraction
• Maximum operating temperature: approx. up to 120 °C
• Joint type: push-fit (socket), with rubber seal on both ends
• Purpose: spanning longer straight sections of the flue path with a minimum number of joints
• Manufacturer: Vaillant Group
• Warranty: 2 years

Why choose a 2.0 m component instead of several shorter ones

When designing longer straight sections of the flue path (for example a tall chimney shaft in an apartment building, or a long horizontal collection run in a cascade boiler room), it is technically and practically more advantageous to use the smallest possible number of longer components instead of a larger number of shorter ones. Every additional joint in the system represents:

• an additional potential point where a slight leak could occur due to imperfect installation or seal wear,
• additional installation labour (more joints = more time for assembly and leak-tightness inspection),
• a somewhat higher overall flue gas flow resistance due to the slight narrowing of the cross-section at each push-fit joint.

Using 2.0 m extensions instead of twice the number of 1.0 m components thus reduces the number of joints along the run by exactly half, resulting in faster installation, lower risk of leakage, and somewhat smoother flue gas flow. By combining 2.0 m components (for the main length of the run) with an optional single 1.0 m component (for fine adjustment of the remaining distance), it is possible to efficiently cover almost any required total length of a straight section.

Specific features of installing the longer component

Installation of the 2.0 m extension is in principle no different from the shorter variant, but due to the greater length and weight of the component, it requires somewhat more care during handling and mechanical fastening:

1. When handling the two-metre component (especially during installation in a vertical shaft or overhead ceiling installation), it is advisable to work with two people to avoid accidental impact on the sealing surfaces or damage to the component.
2. Mechanical support using spacer brackets is even more important for a longer component - we recommend placing brackets at regular intervals along the entire length to prevent the pipe from sagging under its own weight, especially with horizontal routing.
3. Maintaining the correct slope (min. 3° towards the drainage point) is more demanding for precise installation on a longer component than on shorter sections - we recommend checking the slope with a spirit level continuously throughout the installation, not only at the beginning and end of the section.
4. For vertical installation in a shaft, the thermal expansion of the longer pipe section must also be taken into account when the flue gas temperature changes - the system's push-fit joints are designed to accommodate this expansion, but the component should not be installed in an extremely taut state without minimal clearance at the joint.

Typical usage scenarios

The two-metre extension is most commonly used in the following situations:

• Tall chimney shafts - when the flue passes through several floors of a building to a roof outlet, where a considerable height must be spanned with a minimum number of joints.
• Long horizontal runs - for example when routing the flue path through a plant room or technical floor to a more distant shaft or facade outlet.
• Cascade collection runs - when connecting several boilers in a row to a common collection run, where the distance between individual boilers and the main vertical section can reach several metres.
• Renovations and boiler replacements - when replacing an old atmospheric boiler with a new Vaillant condensing model, where a new flue path needs to be built along the route of the original chimney.

Compatibility

The two-metre extension Ø130 mm is fully compatible with the entire range of Vaillant flue accessories of the same diameter - the shorter 1.0 m extension, elbows at 87°, 45°, 30° and 15°, the inspection T-piece, spacer brackets, as well as connection and extension sets (S1, S2, S3 including the Ø150/130 mm reducer for ecoCRAFT boilers). Thanks to the uniform push-fit joint system, the components can be freely combined to assemble a flue path of the exact length required for a specific installation.

Maintenance and inspection of longer sections

Longer straight sections require somewhat more thorough inspection during regular revisions (carried out by an authorised chimney sweep) than shorter components, simply because a greater length increases the likelihood of a localised problem occurring (e.g. insufficient fastening in the middle of a long horizontal section). The inspection primarily checks:

• the leak-tightness of both end joints of the component,
• the condition and placement of mechanical fastening (spacer brackets) along the entire length,
• maintenance of the correct slope throughout the section (checking for sagging),
• the overall visual condition of the pipe surface (mechanical damage, deformation).

Why choose an original Vaillant component

As with the shorter 1.0 m variant, using an original Vaillant component is essential for maintaining gas-tightness and compatibility with other elements of the system, also for the two-metre extension. In addition, for the longer component, material quality also plays a role in terms of mechanical rigidity - insufficiently rigid material could result in greater sagging over the two-metre length in case of imperfect mechanical fastening than would be the case with a shorter piece. The original Vaillant component is designed to reliably withstand its own weight as well as operational stress throughout the service life of the system, provided the recommended spacing of spacer brackets is used.

Frequently Asked Questions

Standards and legislation

As with all components of this range, the installation of the 2.0 m extension must comply with applicable standards (STN 73 4201, STN EN 1856, STN EN 14471) and be carried out by a professionally qualified person, with subsequent inspection by an authorised chimney sweep before the boiler is put into operation. For longer sections, increased attention should also be paid to clearance requirements from combustible structures, which may be relevant at multiple points along a longer run.

Material comparison - why not a metal flue for long runs

For longer straight sections of the flue path, it might seem advantageous to use metal (stainless steel) piping, which is inherently more rigid and less prone to sagging. In practice, however, condensing boilers permanently generate acidic condensate, against which the flue material must remain resistant long-term without risk of corrosion - and it is precisely in this respect that polypropylene has an advantage over standard stainless steel in terms of complete chemical inertness towards condensate, without risk of gradual corrosion of either the joints or the pipe wall over years of operation. The lower weight of the plastic pipe also significantly facilitates handling of the two-metre components during installation itself, especially at height or in confined shafts, where handling a heavier metal component of the same length would be considerably more difficult. The slightly lower mechanical rigidity of plastic compared to metal is addressed precisely by the recommended closer spacing of spacer brackets on longer sections, achieving equally reliable mechanical stability without any compromise in chemical resistance.

Route planning - practical example

Consider a typical situation: a boiler room in the basement of an apartment building, from which the flue path runs through a vertical shaft across six floors to a roof outlet, with a total required height of approximately 18 metres. Instead of installing eighteen one-metre components (which would mean seventeen additional joints), it is far more efficient to use nine two-metre extensions, reducing the number of joints along this section by roughly half. If the total height is not an exact multiple (for example 18.5 m), the remaining 0.5 m is compensated by combining it with a shorter 1.0 m component, or by adjusting the length of the connection set at the beginning or end of the run. This approach - maximising the use of longer components while compensating the remainder with a shorter component - is common practice when designing flue systems of this type.

Storage and transport

Due to its length of 2.0 m, this component must be supported along its entire length during transport and storage to prevent permanent deformation before installation. Store the component in a dry environment protected from direct sunlight, ideally in a horizontal position with support at several points.

When to choose the shorter 1.0 m component instead

Despite all the advantages of the longer component, there are situations where it is more appropriate to choose the shorter 1.0 m extension instead of this 2.0 m variant - typically in very spatially constrained technical rooms where handling a two-metre component is not physically possible, or when fine adjustment of the remaining length is needed at the end of a run otherwise assembled from 2.0 m components. We therefore recommend combining both components when ordering so that the resulting total length matches the actual distance measured on site as precisely as possible, giving preference to the longer 2.0 m components wherever space conditions allow.

Ordering for service companies and bulk buyers

Heating and service companies that regularly carry out installation or servicing of Vaillant flue systems commonly keep two-metre extensions in stock in larger quantities, as this is a frequently used component in almost every larger installation or boiler room renovation. When planning stock, we recommend taking into account not only currently ongoing projects but also expected demand from service interventions, where a quick replacement of a damaged section may be needed without waiting for delivery from a supplier.

Summary

The two-metre flue extension Ø130 mm is an efficient solution for spanning longer straight sections of the flue path with a minimum number of joints, resulting in faster installation and lower risk of leakage compared to using several shorter components. Combined with other elements of the Ø130 mm range (elbows, T-piece, connection and extension sets, spacer brackets), it allows a complete flue path to be assembled exactly according to the layout of the boiler room, while maintaining full compatibility and gas-tightness of the system even on longer runs. We always recommend purchasing original Vaillant components, carefully planning the combination of lengths based on actual measurements taken on site, and entrusting the installation and subsequent regular inspection to professionally qualified persons with the appropriate authorisation to work with gas appliances and flue systems, with an emphasis on complying with applicable technical standards throughout the entire installation.