Vaillant outdoor unit connection Screwing Can also be used for indoor unit
Code: 0010027989Related products
Product detailed description
Vaillant – Connection of the outdoor unit Screwing (screw connection), also suitable for the indoor unit
Original connecting kit from Vaillant for connecting the outdoor unit of the heat pump aroTHERM plus to the heating water distribution system, offered as an alternative to the pressfit version – with a screwing (compression) termination on the side of the distribution pipe. Like the pressfit version, it consists of a pair of flexible stainless steel corrugated hoses with thermal insulation, differing only in the type of end fitting, which does not require a professional press tool.
Construction and design
The kit includes 2× stainless steel corrugated flexible tubes (typically approx. 425 mm), one side with a flat gasket and a slip-on nut G 1 1/4" for connecting to the unit, the other side with a screwing (compression) connection allowing mechanical connection to the pipe without pressing – suitable, for example, for renovations, additional route modifications or where a system-specific press tool compatible with the given diameter is not available on site. The set also includes a thermal insulation of both ends of the connection.
Difference from the pressfit version
The screwing (compression) connection is detachable – it can be opened again after several years, for example during service interventions, replacement of a pipe section or route modification, without the need for cutting and re-pressing. The disadvantage is the need for periodic tightening checks (especially in the first few months after commissioning, when slight thermal expansion of the materials occurs) and a theoretically higher risk of leakage due to improper tightening compared to a permanent pressed connection. The choice between the two variants (Pressfitting vs. Screwing) depends on the installation company's habits and the specific conditions on site.
Application
The kit is used as a connecting link between the outlet from the outdoor unit (or from its connecting kit for floor or wall installation) and the distribution leading to the indoor unit/hydraulic module uniTOWER. The flexibility of the corrugated tube compensates for minor misalignments during pipe alignment and dampens the transmission of vibrations from the compressor of the outdoor unit into the fixed pipe system of the building.
Technical parameters
- Number of pieces: 2× flexible stainless steel corrugated tube
- Tube length: approx. 425 mm
- Connection: 1 side – flat gasket with slip-on nut G 1 1/4" (to the unit); 2. side – screwing/compression connection (to the distribution)
- Insulation: included in the delivery, thermal insulation sleeve on both ends
- Weight: approx. 4.8 kg
- Intended for: aroTHERM plus, usable also for connecting the indoor unit
Installation notes
During installation, it is necessary to follow the specified tightening torque of the connection according to the manufacturer's installation instructions – insufficient tightening will cause leakage, excessive tightening may damage the gasket or thread. After installation, it is recommended to perform a pressure test and a visual check of tightness before insulating and permanently covering the route. Installation must be carried out only by a person authorized for the installation of heat pumps and continuous heating systems.
Common questions
Is this kit interchangeable with the pressfit version? Yes, both have the same connection on the side of the unit, they differ only in the termination towards the distribution – the choice depends on the preferred installation technology.
Can the connection be disassembled after several years? Yes, unlike the pressed connection, the screw connection is detachable, which you will appreciate during service or route modification.
Is it necessary to purchase gaskets separately? No, the kit is complete including gaskets and insulation, ready for direct installation.
Operational and service recommendations
For the screwing (compression) type of connection, we recommend checking the tightening not only during commissioning, but also repeating it after the first weeks of operation, when the gasket settles after the first temperature cycles. Thereafter, it is sufficient to check during the regular annual service inspection together with a visual inspection of the connection insulation.
Related accessories
The kit is suitable to be combined with a complete set for floor or wall installation (0010027971 / 0010027974), or with an extension part (0010027972) for longer routes. If the installation company has professional pressing tools, consider also the pressfit version of this kit, which after pressing does not require periodic tightening checks.
Warranty and professional installation
The product is covered by a warranty period of 24 months. Installation must be carried out exclusively by a professionally qualified person authorized for heat pump installation; an improperly tightened screw connection is among the most common causes of reported leaks during DIY installation, therefore we strongly recommend entrusting the installation to a certified service company.
Delivery
The product is compact and shipped as a regular parcel; when ordering together with other accessories, we recommend choosing joint delivery.
How to choose the correct connecting kit
Vaillant offers several mutually interchangeable parts for connecting the outdoor unit aroTHERM plus to the heating water distribution system, from which the installation company will assemble a complete route according to the specific site conditions:
- Type of transition – from below through the foundation/ground (floor installation kit) or from the side through the wall of the house (wall installation kit) – the choice depends on the position of the unit relative to the house and the routing of the distribution in the project.
- Type of end connection to the distribution – pressfit (permanent and maintenance-free after pressing) or screwing/compression (detachable, does not require professional pressing tools).
- Need for route extension – when the distance between the unit and the transition point is greater (e.g., when combined with an elevated base or with larger units with the uniTOWER module), the basic kit is supplemented with an extension part.
All parts are designed to form a continuous, thermally insulated and mechanically protected route that meets the requirements of current legislation for limiting thermal losses through the building envelope. We recommend leaving the exact selection and combination of individual parts to the installation company based on the specifics of the site.
Installation procedure step by step
- Check the coaxiality and cleanliness of the sealing surfaces before connecting the hoses to the unit and to the distribution.
- Screw and tighten the slip-on nut with the flat gasket to the connecting neck of the unit.
- Connect the screwing (compression) end of the tube to the distribution pipe and tighten to the specified torque.
- Install the supplied thermal insulation on both ends of the connection.
- Perform a pressure test of the circuit and a visual check of the connection tightness.
- After several weeks of operation, repeat the tightening check of the connection, then complete the insulation and covering of the route.
Additional parameters
| Category: | Heat Pump Accessories |
|---|---|
| Warranty: | 2 years |
| Weight: | 10 kg |
| Type: | Connection Kit |
| Purpose: | Connecting the outdoor unit |
| Possible Use: | Outdoor and indoor unit |
| Product Code: | 0010027989 |
| Connection Type: | Bolting |
| Compatibility: | Outdoor and indoor unit |
| Supplier Code: | 0010027989 |
| Kit Type: | Outdoor unit connection kit with nut |
| Usage: | Connecting the outdoor unit |
| Availability: | On request |
| Supplier Code (other source): | 810319 |
| Brand: | Vaillant |
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About the company
The Vaillant Group is synonymous with heating and hot water preparation, placing particular emphasis on quality, reliability and user comfort. Its heating technology products are present in more than 100 countries around the world. The group unites the brands Vaillant, Saunier Duval, AWB, Bulex, DemirDöküm, Glow worm, Hermann Saunier Duval and Protherm. Each of these brands has extensive experience in the production of heating equipment, as most of them have been active in this segment for more than 80 years. With its 140 years of market presence, the brand Vaillant is among the largest and most significant. It has long been a market leader and a pioneer in the development and innovation of heating technologies in Europe. The Vaillant Group has an extensive network of sales representatives and thousands of satisfied customers around the world.
The extensive portfolio of the Vaillant Group includes modern heating technologies that are energy-saving, efficient and contribute to environmental protection. Thanks to a wide range of products and models, every customer can find exactly what they need here. The range includes wall-hung and floor-standing boilers, hot water storage tanks or electrical appliances. In the market of wall-hung boilers, the company is even number one in Europe with a 26 percent market share. The Vaillant Group is not specialized only in the development and production of boilers; its product portfolio also includes technologies that use renewable energy sources, such as solar systems or the most modern heat pumps and air conditioners. It also offers recovery or cogeneration units or zeolite heat pumps to users.
Vaillant Group thinks ahead every day and offers individual solutions for every need and type of energy. Its success is also based on research and development, which always takes place in line with the wishes of customers. The company's research and development department is among the largest and above all the most creative departments in this segment. The team of developers is constantly working on new devices and technological systems that are increasingly easy to operate and already meet the demands of tomorrow. Whether it is about energy solutions of the future or about the best way to use fossil fuels, the company Vaillant Group tries to anticipate new trends and to be always one step ahead of others. Proof of this is the registration of up to 100 new patents every year. In the field of production, the company places the greatest emphasis on achieving the highest quality of boilers, which represents perfection in every detail.
The Vaillant Group has its presence in most countries of the world. Slovakia is no exception, where the company Vaillant Group Slovakia, s. r. o. is located, representing the brands Vaillant and Protherm. Heating equipment of the Vaillant Group is produced in seven production plants, two of which are located on our territory. These factories employ more than 1,300 people in total. The production plant Protherm Production with its headquarters in Skalice specializes in the production of electric and floor-standing boilers for all brands belonging to the Vaillant Group. It can also boast its own research and development center, which is among the most modern in Europe. The second production plant in Slovakia is Vaillant Industrial Slovakia in Trenčianske Stankovce, which produces modules for wall-hung boilers for the entire group.

History of the company Vaillant
The history of the company Vaillant goes back to the year 1874, when it was founded by Johann Vaillant in Remscheid, Germany. Since then, the company Vaillant has been a leader in the field of heating and ventilation technologies.
History of the company Vaillant
1874 Plumber Johann Vaillant founded the company.
1894 Patented for the invention of a gas water heater with a "closed system" design.
1899 Registered company logo, the Easter Bunny.
1905 Development of a wall-mounted water heater, patented under the designation "Geyser".
1924 Development of a wall-mounted boiler for heating.
1955 Production of the millionth appliance after the end of the Second World War.
1960 Production of electrical appliances begins.
1967 Development of a combined wall-mounted boiler.
1974 11 million appliances sold since 1974.
1992 Establishment of subsidiary companies – in the Czechoslovak Republic, Hungary, Poland and Turkey.
1993 Separation of Czechoslovakia leads to the creation of a separate sales representation in Slovakia.
1999 Anniversary, 125th anniversary of the founding of the company, 40 million appliances sold in the entire history of the company.
2001 The Vaillant Group is formed, covering eight significant manufacturers of heating equipment in Europe, including the boiler manufacturer Protherm in Slovakia.
2003 The Vaillant Group production plant in Skalice specializes in the production of floor-standing boilers also for other brands belonging to the VG group.
2004 Vaillant Group opens a new production plant in Trenčín, Slovakia, for the production of hydraulic groups for wall-hung boilers.
2009 10,000,000 modules for heating equipment produced at the VG Trenčín plant.
Easter Bunny in the logo - intended for the success of the company
Pink dwarfs and cute animals stand around and admire the miracle of the egg. Johann Vaillant is fascinated by the scene and decides to buy both the picture and the copyright. For Vaillant, this means the establishment of its brand and an extremely successful story.

Very distinctive brand profile
Since 1899, the motif has adorned all products, catalogs and brochures. In a few short years, Vaillant built an excellent reputation that spread throughout Germany and even beyond its borders. Vaillant gave its logo clear lines and outlines. "The Bunny in the Egg" remains the central theme, but the word "Vaillant" is added.

Many Germans know that the Vaillant Bunny belongs to a company based in North Rhine-Westphalia. Moreover: more than 70% of all Germans have heard of the company Vaillant. In Austria and the Netherlands, the company achieves similar results for its image.
Sustainability
As a forward-looking, family-owned company, we accept special responsibility for the environment, for our employees and for society. We are convinced that economic success, sustainable and profitable growth are inseparably linked to a commitment to social and ecological standards.
In order to fulfill this commitment, we are committed to carrying out our activities in a sustainable manner within the strategic S.E.E.D.S. Program (Sustainability in Environment, Employees, Development & Products and Society). The definition of these areas of interest is based on a comprehensive understanding of sustainability, in which we also take into account key issues of our core activities.

