Compression welded coupling SiGMA-Li SIGMA LI GZ. - 32x1 PE-RT pipe fitting

Welded coupling SiGMA-Li SIGMA LI GZ. - 32x1 is a metal compression fitting designed for use with PE-RT pipes that have a 32 mm outer diameter and a 1 mm wall thickness or matching threaded connections. The fitting creates a welded compression joint that ensures a mechanically secure and leak-resistant connection suitable for plumbing and heating installations. It is intended for use in systems where PE-RT tubing is specified and where a reliable metal-to-plastic transition is required.

Advantages

The SiGMA-Li welded compression coupling provides a robust mechanical connection between PE-RT pipe ends and metal fittings without relying solely on adhesive or heat fusion. Its construction supports long-term performance in hot-water circuits and underfloor heating systems, offering resistance to pressure and temperature variations typical of domestic heating and plumbing applications. The fitting’s design simplifies installation while maintaining consistent sealing and alignment of PE-RT piping runs.

Suitable for

• Domestic hot-water distribution
• Underfloor heating systems
• Plumbing installations with PE-RT piping
• Repair or replacement of existing PE-RT pipe sections

Key specifications

• Compatible pipe outer diameter: 32 mm
• Compatible pipe wall thickness: 1 mm
• Connection type: welded compression coupling for metal-to-PE-RT
• Material: metal fitting for mechanical compression joints
• Suitable media: potable hot and cold water, heating fluid

How to use

Prepare the PE-RT pipe by cutting it squarely and deburring the cut end. Slide the coupling components onto the pipe as required by the product design, ensuring the pipe reaches the correct insertion depth. Assemble the compression parts and perform the welded compression procedure according to the fitter’s method or the coupling manufacturer’s installation practice to obtain a secure, leak-tight joint. After assembly, inspect the connection for correct alignment and test the system under working pressure before final commissioning.

Usage recommendations

Use the coupling with PE-RT pipes that meet applicable standards for temperature and pressure; ensure pipe dimensions (32 mm outer diameter, 1 mm wall) match the fitting. Follow local plumbing and heating codes, and where relevant, perform pressure and leak tests after installation. Use appropriate tools and trained personnel for welded compression assemblies.