At Onninen, we fully understand how crucial the right choice of installation pipes is for the durability and efficiency of any water and heating system. Our many years of experience in the installation industry show that the right material decision determines the lifespan of the installation for decades to come.
The modern market offers a wide range of solutions - from traditional steel and copper pipes to modern plastic systems. In our assortment, you will find comprehensive solutions from renowned manufacturers such as Wavin, Kan-Therm, Uponor, and our flagship brand Onnline, which guarantees an excellent quality-to-price ratio.
As a leader in the distribution of installation materials, we know that the choice of appropriate systems for C/Z water and heating requires consideration of operating parameters, building specifics, and end-user expectations.
Check C/Z water and heating systems at Onninen warehouse
Classification of installation pipes by material
From our practice, it follows that installation materials are divided into two main categories, each with unique properties and areas of application.
Metal pipes - proven solutions
In Onninen's offer, you will find steel and copper pipes that have been trusted by installers for decades in demanding applications.
Copper pipes stand out for their exceptional durability and natural bacteriostatic properties. Our offer includes copper pipes of varying hardness - from soft (easy to shape) to hard (for pressure installations). The main advantages are:
- Corrosion resistance - with appropriate water quality
- Bacteriostaticity - natural inhibition of microorganism growth
- High mechanical and pressure strength
- Low hydraulic resistance - smooth interior of the pipes
- Resistance to UV and temperature changes
Steel pipes from our offer are a solution for industrial applications and installations requiring maximum mechanical strength. We offer galvanized pipes for potable water and black pipes for heating installations.
Modern plastics
In contemporary construction systems, plastic pipes play an increasingly important role. Our experience shows a growing interest in these solutions due to their ease of installation and corrosion resistance.
| Type of material | Working temperature | Main application |
|---|---|---|
| PE (Polyethylene) | up to 40°C | External installations, cold water |
| PEX (Cross-linked Polyethylene) | -10°C to +95°C | Underfloor heating, hot water installations |
| PP-R (Random Polypropylene) | -40°C to +95°C | Water and heating installations |
PEX Systems - flexibility and durability
In our assortment, we particularly recommend PEX (cross-linked polyethylene) pipes as a universal solution for water and heating installations. From experience, we know that these pipes perform excellently in underfloor heating systems and hidden installations.
The advantages of the PEX system that our clients appreciate are:
- Flexibility - easy routing in difficult places
- Freeze resistance - does not crack at -25°C
- Shape stability - retains the given shape after bending
- No corrosion and scale buildup
- Quick installation using crimp fittings
In Onninen's offer, there are water pipes PEX of various brands, including our Onnline solutions with insulation, significantly reducing heat loss.
PP-R Pipes - proven in all conditions
We also recommend PP-R (random polypropylene) pipes as an economical and reliable solution. Our technical team confirms their excellent properties in water and heating installations.
Key features of PP-R pipes from our offer:
- Polyfusion welding - connections form a single unit
- Thermal resistance - operation up to 95°C at nominal pressure
- Smooth walls - minimal flow resistance
- Stabilization with fiberglass - limited thermal expansion
- Ease of installation - does not require specialized tools
In PP-R systems, we particularly recommend our Stabi pipes reinforced with fiberglass, offering increased dimensional stability at varying temperatures.
PE Pipes - for external installations
For external installations and water supply networks, we recommend proven PE (polyethylene) pipes. We offer a wide range of diameters and pressure classes, tailored to various design requirements.
The advantages of PE pipes in our offer:
- UV resistance - with stabilizer addition
- Flexibility - facilitates laying on uneven terrain
- Long coils - minimal number of connections
- Resistance to chemicals and soil corrosion
In our assortment, you will find single-layer, double-layer (Titan), and triple-layer (Aqua Spectra) PE pipes with microbiological protection.
Multi-layer pipes - the best of both worlds
We particularly recommend multi-layer pipes as a solution combining the advantages of plastics with the properties of metal. In Onninen's offer, PE-X/AL/PE and PE-RT/AL/PE systems are available.
The multi-layer construction provides:
- Anti-diffusion barrier - 100% oxygen tightness
- Shape stability - aluminum layer
- Low thermal expansion
- Excellent hydraulic parameters
We offer complete multi-layer systems from Wavin, Uponor, and our Onnline solutions with insulation in blue and red colors for easy identification of installations.
Frequently Asked Questions
1. Which pipes to choose for central heating installations?
For heating installations, we recommend PP-R Stabi, PEX, or multi-layer PE-X/AL/PE pipes. From our experience, pipes stabilized with fiberglass perform best, limiting thermal expansion at high operating temperatures of the heating system.
2. Are PEX pipes suitable for drinking water?
Yes, PEX pipes have PZH hygiene certificates for contact with drinking water. They are non-toxic, free from heavy metal ions, and do not affect the taste or smell of water. In our offer, all PEX systems have appropriate certificates for sanitary applications.
3. What is the lifespan of plastic pipes?
Properly installed plastic pipes have a lifespan of 50-80 years. In practice, we see PP-R and PEX installations operating reliably for over 20 years. Key is to maintain operating parameters and professional installation according to the manufacturer's recommendations.
4. Can different types of pipes be connected in one installation?
Yes, but it requires appropriate transition fittings and consideration of expansion differences. In Onninen's offer, there are fittings that allow connecting plastic systems with metal pipes, maintaining the tightness and durability of the entire installation.
5. Which pipes are best for underfloor heating?
For underfloor heating, PEX pipes 16-20mm with an anti-diffusion barrier perform best. Their flexibility facilitates laying, and resistance to high temperatures ensures safe operation. We also recommend multi-layer PE-RT/AL/PE pipes for higher heating capacities.
6. How to choose the diameter of the pipe for water installation?
The diameter depends on the flow, length of the installation, and pressure drop. For domestic installations, we most often use: DN15-20mm for draw-off points, DN25-32mm for risers, DN40mm and more for main distribution boards. Our specialists will help in selecting optimal diameters.
7. Do plastic pipes require insulation?
Hot water and heating pipes absolutely require thermal insulation. It limits heat loss and prevents condensation. In Onninen's offer, there are pipes already in insulation, which speeds up installation and guarantees the proper thickness of insulation.
8. What tools are needed for installing plastic pipes?
For PP-R: welding iron, scissors, calibrator. For PEX: crimping tool, scissors, wrenches. At Onninen, we offer complete sets of installation tools and training for installers on the operation of plastic systems and professional installation techniques.
Comprehensive technical support from Onninen
As a leader in the installation market, we offer not only high-quality products but also comprehensive technical support at every stage of project implementation. Our experts will advise on selecting optimal solutions, taking into account the specifics of the installation and investment budget.
In our branches across Poland, products are available immediately, ensuring continuity of supply even for the largest projects. We also provide regular training on the installation and operation of modern piping systems.
With Onninen's assortment, you gain assurance of the highest quality materials, competitive prices, and professional technical advice. Our many years of experience and understanding of the needs of the installation industry guarantee the success of every project - from small domestic installations to extensive industrial systems.