Crimp / welded coupling SiGMA-Li SIGMA LI Mufa zgrzewana - 25 PE-RT for 25 mm pipe

Welded coupling SiGMA-Li SIGMA LI Mufa zgrzewana - 25 PE-RT for 25 mm pipe is a connector engineered for reliable permanent joints in PE-RT piping systems. Designed to join two 25 mm PE-RT pipes by welding, this coupling is intended for use in indoor distribution networks, underfloor heating circuits and potable water installations where a durable, leak-resistant connection is required.

Advantages

The welded coupling provides a permanent, high-strength connection that minimises the risk of leaks and mechanical separation. Its design is compatible with standard 25 mm PE-RT pipe dimensions and welding procedures, enabling consistent joints with professional fusion tools. Installation with the welded coupling reduces the need for mechanical fittings, which can save space and lower the number of potential failure points in a piping system.

Suitable for

• Underfloor heating circuits using 25 mm PE-RT tubing
• Indoor potable water distribution with PE-RT pipes
• Plumbing branch runs and risers in residential and commercial buildings
• Renovation projects requiring replacement of short pipe sections

Key specifications

• Compatible pipe outside diameter: 25 mm
• Material type: PE-RT compatible thermoplastic fusion coupling
• Connection method: welding (fusion) for permanent joint
• Intended application: potable water and heating distribution
• Suitable for indoor use and underfloor heating systems

How to use

Prepare the pipe ends by cutting them square and removing any debris or burrs. Follow the welding (fusion) tool manufacturer's instructions: insert the prepared 25 mm PE-RT pipe ends into the coupling, apply the required heat and pressure for the recommended time, and allow the joint to cool undisturbed to form a permanent bond. Verify the alignment and correct insertion depth before activating the welding tool. After cooling, inspect the joint visually and test the system according to local plumbing and heating standards.

Usage recommendations

Use certified fusion equipment and follow local codes and installer guidelines. Ensure pipes are compatible with PE-RT fusion methods and perform pressure testing after installation to confirm joint integrity.