Comap press-fit reducing coupling PPSU 40x3.5 - 26x3 for plastic piping

Comap press-fit reducing coupling PPSU 40x3.5 - 26x3 is a mechanical fitting designed to join plastic pipes of different outer diameters in water distribution and heating systems. Manufactured from PPSU (polyphenylsulfone), this press-fit coupling provides a secure, metal-free connection that is resistant to thermal stress and compatible with common plastic piping materials used in domestic and light commercial installations.

Advantages

This reducing coupling offers a permanent press-fit connection without the need for soldering, glues, or welding. The PPSU material ensures good resistance to hydrolysis and high temperatures typical for heating circuits, while maintaining dimensional stability. The coupling delivers a compact solution for downsizing pipe runs and reduces installation time thanks to simple pressing tools. Its corrosion-free composition and smooth internal bore help preserve flow characteristics and minimize maintenance needs.

Suitable for

• Connecting plastic piping with outer diameters 40x3.5 mm to 26x3 mm
• Domestic hot and cold water distribution systems
• Light commercial heating and radiator connections
• Situations requiring a compact mechanical reduction without soldering or adhesives

Key specifications

• Material: PPSU (polyphenylsulfone)
• Connection type: press-fit reducing coupling
• Pipe outer diameters: 40 x 3.5 mm to 26 x 3 mm
• Application: potable water and heating systems compatible with plastic piping
• Design: compact, metal-free body with smooth internal bore

How to use

Cut pipes squarely and deburr inner and outer edges before insertion. Mark the insertion depth on both pipe ends, insert each pipe fully into the respective end of the coupling, and ensure alignment. Use the appropriate press tool and jaws for the specified pipe dimensions to perform a complete press cycle at each end, following the press tool manufacturer's instructions. After pressing, verify the mechanical joint visually and by gentle pull to confirm secure engagement.

Usage recommendations

Verify compatibility of the PPSU coupling with the plastic pipe material and the operating temperature and pressure of the system. Store fittings away from direct sunlight and install at ambient temperatures recommended for PPSU components. For critical or buried applications consult local codes and installation standards and use certified press tools and trained personnel to ensure long-term reliability.