Vaillant flue extension Ø130 mm, length 1.0 m

Product detailed description

Vaillant flue extension Ø130 mm, length 1.0 m

The straight flue extension Ø130 mm with a length of 1.0 meter is a basic building component of the Vaillant flue system for condensing boilers. It is used to extend the flue gas path between the boiler and the shaft, roof outlet, or between individual system components (elbows, T-pieces, connection sets) in cases where it is necessary to bridge a distance exceeding the length of standard connecting parts. Made of polypropylene (PP), this part together with other components of the Ø130 mm range (elbows, T-piece, connection and extension sets, spacer brackets) forms a complete modular system, from which the flue gas path can be assembled exactly according to the layout of a specific boiler room.

Technical characteristics

• Nominal diameter: Ø130 mm
• Length: 1.0 m
• Material: polypropylene (PP), resistant to condensate and to the temperatures of flue gases from condensing operation
• Operation type: pressurized (type C), suitable for condensing boilers with forced flue gas extraction
• Maximum operating temperature: up to approx. 120 °C
• Joint type: plug-in (socket) joint, with rubber seal at both ends (socket/spigot)
• Purpose: extension of the flue gas path between other components of the Ø130 mm system
• Manufacturer: Vaillant Group
• Warranty: 2 years

When to choose the 1.0 m extension instead of the 2.0 m version

The Vaillant flue accessory range offers straight extensions in two standard lengths - 1.0 m and 2.0 m - to allow the total length of the flue gas path to be adapted as precisely as possible to the actual distance at the installation site with the fewest possible joints (fewer joints mean fewer potential leak points and lower installation effort). The shorter 1.0 m extension is the better choice in the following situations:

• when finer fine-tuning of the total route length is needed, where a 2.0 m piece would cause excessive overhang,
• in more confined boiler rooms, where handling a longer 2 m piece during installation is not practical,
• when combining with multiple elbows in a short section, where more short straight segments are needed between individual direction changes,
• as an additional piece to make up the remaining distance after using several 2.0 m extensions on the main route.

Conversely, for longer straight sections (for example in tall shafts or long horizontal routes), it is more efficient to use 2.0 m extensions, as they reduce the total number of joints needed to bridge the given distance.

Installation

Installing the extension is simple thanks to the plug-in (socket) joint system, but it should nevertheless be carried out by a professionally qualified person as part of the complete installation of the flue gas path. The procedure includes:

1. Checking the direction of the plug-in joint - the socket and spigot ends of the part have a defined insertion direction (usually in the direction of condensate flow, i.e. the socket positioned higher).
2. Inserting the extension into the adjoining part (elbow, T-piece, connection set) all the way to the stop, checking that the rubber sealing ring is properly seated.
3. Providing mechanical support for the longer straight section using spacer brackets (a separate part of this range), especially for horizontal routing, to prevent the pipe from sagging over time.
4. Maintaining the required slope (usually min. 3° towards the drainage point) even on straight sections, to ensure smooth condensate drainage.
5. Visually checking the tightness of all joints after completing the installation.

Compatibility

The Ø130 mm x 1.0 m extension is fully compatible with the entire range of Vaillant flue accessories of the same diameter - connection sets S1/S2 (including the Ø150/130 mm reducer for ecoCRAFT boilers), the S3 extension set for cascade connections, elbows at angles of 87°, 45°, 30° and 15°, the inspection T-piece and spacer brackets. Thanks to the unified system of plug-in joints, the parts can be freely combined to assemble a flue gas path exactly according to the needs of a specific installation.

Why the quality of the straight pipe matters in pressurized operation

Although a straight section of pipe may seem like the simplest part of the whole system, it is precisely the long straight sections where any lack of material quality shows most - for example, insufficient wall rigidity of the pipe could, over longer spans, lead to sagging and consequent deterioration of condensate drainage, or to stress on adjacent joints. The polypropylene used in the manufacture of this extension was chosen precisely for its good mechanical stability at the operating temperatures of condensing boilers, as well as for its chemical resistance to the slightly acidic condensate that is common in condensing operation.

Maintenance

The straight extension itself does not require special maintenance beyond regular inspection of the entire flue gas path - during regular inspections (carried out by an authorized chimney sweep), the tightness of the joints at both ends of the part, the mechanical fastening (spacer brackets), and the overall condition of the pipe surface (absence of mechanical damage, deformation) are checked. Due to the material (PP), the pipe is not susceptible to corrosion.

Why an original Vaillant part

Using an original extension instead of universal PP pipe from another manufacturer ensures exact dimensional compliance with the rest of the system (diameter, wall thickness, shape of the plug-in joint and sealing ring), which is crucial for maintaining the gas-tightness of the entire flue gas path in pressurized operation. The original part is also tested by the manufacturer in combination with the other accessories of the range, eliminating the risk of dimensional or material incompatibility when combined with other system parts.

Frequently Asked Questions

Why polypropylene and not metal for condensing boilers

Older atmospheric boilers commonly used metal (most often stainless steel) flues, which withstood high flue gas temperatures well but were more susceptible to corrosion caused by acidic condensate, which occurred only occasionally in classic boilers. Condensing boilers, on the other hand, deliberately use the condensation of water vapor from flue gases to increase efficiency, which produces permanent and fairly acidic condensate (pH value typically around 3-5) throughout operation. The polypropylene used to make this extension and the entire Ø130 mm accessory range is durably resistant to this condensate, does not corrode, and does not require any surface treatment as protection against the chemical effects of flue gases. At the same time, it has sufficient temperature resistance for the typical operating temperatures of flue gases from condensing boilers (up to approx. 120 °C), with significantly lower weight than a comparable metal part, which makes handling and installation easier, especially on longer horizontal sections where several extensions need to be mechanically supported.

The entire Vaillant Ø130 mm flue system - where this extension fits in

The Ø130 mm x 1.0 m extension is one of the basic building blocks of the broader range of Vaillant flue accessories, which, in addition to straight extensions (both 1.0 m and 2.0 m), includes connection sets for connecting to the boiler (S1, S2, or with a Ø150/130 mm reducer for ecoCRAFT boilers), the S3 extension set for cascade connection of additional boilers, elbows at angles of 87°, 45°, 30° and 15° for changes of route direction, an inspection T-piece with an inspection and cleaning opening for chimney sweep access and condensate drainage, and spacer brackets for mechanically fastening the pipe in a shaft or along a wall. Thanks to the unified Ø130 mm diameter and the same plug-in joint system, these parts can be freely combined to assemble a complete flue gas path exactly according to the needs of a specific boiler room - from a simple direct connection to a chimney to more complex cascade collector routes with multiple direction changes.

Standards and legislative requirements

The installation of a condensing boiler flue gas path, including straight extensions, must comply with applicable standards, in particular STN 73 4201 (Chimneys and flues), STN EN 1856 (Chimneys - Requirements for chimney systems) and STN EN 14471 (Chimney systems with plastic flue liners). Among other things, these standards define requirements for the mechanical stability, tightness and temperature resistance of materials used in the flue gas path, as well as requirements for slope and condensate drainage. Installation should be carried out by a professionally qualified person, and inspection by an authorized chimney sweep is required before the boiler is put into operation.

Storage and handling

Before installation, we recommend storing the part in a dry environment, out of direct sunlight, which could affect the properties of the plastic in the long term. When transporting longer straight sections (especially the 2.0 m version), make sure they are supported along their entire length to prevent permanent deformation before installation. Protect the sealing surfaces at the ends of the part from mechanical damage.

Practical tips for ordering the correct number of parts

When planning the flue gas path, we recommend measuring the total required route length in advance based on a construction drawing or actual measurement of the boiler room, and splitting it into a combination of 2.0 m and 1.0 m extensions so that the resulting total corresponds as closely as possible to the actual distance between the individual fixed points of the route (boiler, elbows, shaft, roof outlet). In most cases, it is more advantageous to use as many 2.0 m pieces as possible for the main length and make up the remainder with a 1.0 m extension, minimizing the number of joints and the overall installation effort. For more complex routes with multiple direction changes, on the other hand, 1.0 m pieces may be more suitable, as they provide finer granularity for adjusting the length between individual elbows.

We also recommend allowing for a slight reserve when ordering (for example, one extra piece), as having to additionally purchase a single piece during installation can cause unnecessary delay, especially if the supplier does not have the part immediately in stock.

Service life and long-term reliability

With correct installation and compliance with the recommended operating conditions (in particular not exceeding the maximum operating temperature and maintaining the correct slope for condensate drainage), the service life of the polypropylene parts of the Vaillant flue system is comparable to the expected service life of the condensing boiler itself. The material does not corrode, is not abraded by condensate, and, in the absence of mechanical damage, retains its sealing properties over the long term. Regular inspections by an authorized chimney sweep are nevertheless necessary - not primarily because of degradation of the pipe material itself, but to check the tightness of the joints, the passability of the route and the overall condition of the flue gas path as a whole, including related components such as the boiler, connection sets and roof outlet.

Summary and final recommendation

The Ø130 mm x 1.0 m straight extension is a basic and frequently used building component of the Vaillant flue system, which, despite its apparent simplicity, deserves the same attention when selecting and installing as more complex system components (elbows, T-pieces, connection sets). We recommend purchasing only original Vaillant parts, planning the required number and combination of lengths in advance based on an actual measurement of the boiler room, and entrusting installation and subsequent regular inspection to professionally qualified persons.

Thanks to its versatility and compatibility with the rest of the Ø130 mm range, this extension remains one of the most frequently ordered parts for any new installation, boiler room renovation, or additional modification of an existing flue gas path when replacing a boiler with a new condensing Vaillant model. Service companies therefore commonly keep it in stock as a spare part, as it can be universally used in almost any job related to the maintenance or modification of an existing flue route of this system.