comparison of Wavin, Rehau and Uponor brands in the crimping system
Comparison of Wavin, Rehau and Uponor brands in the field of press-fit systems is crucial for professional installers, as each of them offers specific advantages in installation and long-term operation of heating networks. Although all three brands meet the strictest standards for PEX pipes, they differ in the construction details of fittings, the quality of the material of the pressing part and compatibility with different types of pressing tools.
Construction and material of press-fit fittings
Wavin is characterized by the use of low-lead brass and a robust design optimized for fast and safe connection in harsh conditions. Their fittings are designed to minimize the risk of deformation during pressing and ensure maximum joint strength even at high temperatures and pressures.- High resistance to corrosion due to special surface treatment.
- Universal dimensions suitable for a wide range of PEX pipes on the market.
- Emphasis on manufacturing precision to achieve 100% joint tightness.
Pressing technology and tolerances
Rehau and Uponor are known for their precision in manufacturing pressing dies, which require minimal force to achieve an ideal shape of the joint. Rehau often uses stainless steel pressing rings with higher hardness, which allows for longer tool life and less wear during large-scale installation. Uponor, on the other hand, emphasizes the symmetry of the pressing process, where perfect coaxiality between the pipe and the fitting is achieved, eliminating the occurrence of microscopic gaps. These tolerances are critical when used in floor heating, where there is very limited space for repairs.- Rehau: Stainless steel rings for long tool life.
- Uponor: Perfect symmetry for zero risk of leakage.
- Wavin: Fast and efficient application for standard projects.
Compatibility with pressing tools
In practice, it is important to note that pressing heads are not always universal and their selection depends on the specific brand of fitting. For work with products such as Elbow PRESS 90° - for PEX pipe - 17x17, it is essential to use the correct head that accurately replicates the profile of the pressing ring of the respective brand. An incorrect tool can lead to incomplete pressing or damage to the fitting, which subsequently causes leaks. Always check whether your pressing tool supports a specific type of ring (e.g., Uponor has its own standards, while Rehau and Wavin may be compatible with universal systems).Long-term reliability and chemical stability
When comparing these three giants, a decisive factor is their reaction to chemicals contained in thermal insulation or in the water itself. Rehau and Uponor have long-term experience in testing fittings in aggressive environments, which gives them an edge in installations in older buildings with unstable water quality. Their fittings are designed to resist oxidation and sediment formation during decades of operation. On the other hand, Wavin focuses on modern systems where the water is controlled and the insulation materials are of high quality, which allows the use of their more affordable solutions without compromising safety.- Long-term resistance to corrosion and oxidation.
- Testing in simulated real conditions.
- Use of advanced polymers in sealing parts.
Price availability and logistics
For the end customer and installation company, it is important not only the price of the fitting itself, but also the availability of stock and logistics efficiency. Wavin often offers the widest range of standard shapes at competitive prices, making their products ideal for large construction projects with high volume of work. On the other hand, Rehau and Uponor are often preferred for specialized applications where high precision and availability of specific accessories are required, although their price may be slightly higher. The choice of brand should therefore be based on the specific needs of the project and the budget, not just the price list.Practical examples from installation practice
During the implementation of floor heating, we often encountered situations where the installer chose T-piece PRESS - for PEX pipe - 17x1/2"Fx17 from Uponor due to its excellent resistance to vibrations near boilers. This type of fitting has proven itself in repeated thermal expansions, which standard brass fittings could not always compensate for. On the other hand, in standard radiator systems, it turned out that Wavin and Rehau offer better price availability while maintaining the same functionality. It is important, however, to follow the step-by-step installation of press-fit fittings, as even the most expensive fitting will fail if it is not pressed correctly or if the wrong tool is used.- Preference for Uponor in high-temperature and vibration zones.
- Use of Rehau/Wavin for standard radiator networks.
- The critical importance of the correct installation procedure for all manufacturers.
Visual inspection of the crimp ring
After the process is completed, it is critical to check whether the correct "groove" pattern has formed on the crimp ring, indicating that the required pressure and material deformation have been achieved.
Frequently asked questions
How to choose the correct diameter of the crimp fitting for PEX pipe?
Choose a fitting exactly according to the outer diameter of your PEX pipe, for example 17 mm for a 17x17 pipe, to avoid leaks caused by improper fitting. An incorrect diameter leads to insufficient sealing or damage to the crimp ring.Why is my crimped joint not sealing and how can I fix it?
Improper sealing is often caused by dirt on the pipe edge, incorrect setting of the crimping tool, or the use of an incorrect crimping head. The joint must always be re-crimped with a new ring; it must never be re-crimped on an old ring.What crimping tool do I need for 17 mm PEX pipe?
For 17 mm pipe, you need a crimping tool with sufficient crimping pressure and a suitable head that corresponds to the fitting brand (Wavin, Rehau or Uponor) to achieve optimal results. Universal tools are possible, but specialized heads ensure better accuracy.Conclusion
The choice between Wavin, Rehau and Uponor depends on the specific application, budget and requirements for the long-term reliability of the system, with none of these brands being worse than the other. Choosing the right fitting, such as Press Fitting - for PEX pipe - 17x17, in combination with a quality crimping tool and following the installation procedures, is key to trouble-free operation.Do you have a question about this topic?
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