Screwed elbow 16x20 reduced with fitting

Product detailed description

Reduced screwed elbows are essential components in water and heating distribution systems. They allow directional changes in pipe runs while maintaining a secure and leak-free connection. These fittings are commonly used in residential and commercial buildings for underfloor heating, radiator circuits, and potable water distribution. Installers working with composite plastic pipes often require such fittings to adapt to space constraints or to connect to threaded components like valves or manifolds.

These elbows are particularly useful in systems where crimping tools are not available or where flexibility in installation is needed. The use of brass and EPDM ensures good chemical resistance and long-term reliability in hot water environments. The design allows for installation using standard wrenches, reducing the need for specialized equipment and enabling faster assembly on site.

Technical parameters

The technical parameters define the fitting's suitability for specific applications. The maximum operating temperature of 95°C and pressure of 10 bar indicate its use in heating systems and hot water supply. The recommended pipe size of 16x2 mm ensures compatibility with standard composite plastic piping. The presence of two sealing rings and EPDM material contributes to reliable sealing and resistance to thermal expansion effects.

Installation and connection

To install the reduced screwed elbow, align the pipe with the fitting and insert the pipe into the body. Ensure the pipe is fully seated against the internal stop to prevent over-insertion. Secure the fitting using a spanner or wrench, tightening the nut until it is firm. Avoid overtightening, which can damage the sealing rings or distort the fitting. Check that the pipe is clean and free of debris before insertion to ensure a proper seal.

Common mistakes include using incorrect tools, which can damage the threads, or failing to align the pipe correctly. Always verify that the fitting is compatible with the pipe type and that the sealing rings are intact. After installation, perform a visual inspection and apply pressure to the system to detect any leaks. If leaks occur, disassemble the joint, inspect the sealing surfaces, and reassemble carefully.

Compatibility and accessories

This fitting is compatible with PEX-AL-PEX, PE-RT-AL-PE-RT, and other composite plastic pipe types. When installing in a complete system, ensure that all components are from compatible manufacturers. Additional items such as manifolds or valves may be required depending on the system layout.

Related products include the Screwed elbow 1/2x16 with external thread, which can be used in similar applications where a different thread size is required. Ensure all components are sourced from the same system to maintain compatibility and performance.

Technical background for designers

The operating principle of this elbow relies on mechanical compression between the sealing rings and the pipe surface. The brass body provides structural stability and corrosion resistance, while the EPDM sealing rings offer flexibility and resilience to thermal cycling. The design integrates seamlessly into composite pipe systems, allowing for directional changes without the need for additional support structures.

Material properties play a critical role in the fitting's performance. Brass is selected for its strength and durability in wet environments, while EPDM is chosen for its resistance to hot water and steam. The combination of these materials ensures a long service life and minimal maintenance. The internal geometry of the fitting is optimized to reduce flow resistance and prevent turbulence in the system.

Service and operation

During operation, the fitting requires no active maintenance. However, periodic inspections are recommended to ensure that the connections remain tight and that no signs of leakage or wear are present. In case of suspected failure, the system should be depressurized, and the fitting inspected for damage or distortion. Replace the fitting if any defects are found or if the sealing rings show signs of degradation.

Frequently asked questions

Can this elbow be used with PERT Frankische pipes?
Yes, the fitting is compatible with PERT Frankische pipes as listed in the technical specifications.

Is it suitable for use in gas systems?
No, the fitting is not approved for gas applications and should only be used in water and heating systems.

How many sealing rings are included in the fitting?
The fitting includes two sealing rings made of EPDM, providing a redundant sealing system.

Can it be used with stainless steel manifolds?
Yes, the fitting is recommended for use with stainless steel manifolds, ensuring a secure and durable connection.

Documents for download

• Hygienically certified for brass fittings in PEX-AL-PEX system (PDF)