Fitting SiGMA-Li welded tee 20 mm for PE-RT piping PERTT20

The SiGMA-Li welded tee 20 mm for PE-RT piping PERTT20 is a polyethylene raised temperature (PE-RT) fitting designed to form a permanent branch connection in piping networks. Intended for use with PE-RT pipe systems, this welded tee creates a stable, leak-resistant joint when installed with appropriate welding equipment and recommended procedures. It is compatible with typical applications in hot and cold water distribution, underfloor heating circuits and general plumbing where a welded branching point is required.

Advantages

This welded tee offers a reliable, long-lasting connection that reduces the risk of leaks compared with mechanical fittings when correctly welded. Its geometry supports smooth internal flow and minimizes pressure loss at the branch. Made for PE-RT systems, the fitting is suitable for repeated thermal cycles and maintains dimensional stability under normal operating temperatures of hot- and cold-water installations.

Suitable for

• Hot and cold potable water distribution
• Underfloor heating manifolds and branch lines
• Residential and light commercial plumbing installations
• Permanent welded branching in PE-RT pipe networks

Key specifications

• Material: PE-RT (polyethylene for raised temperature applications)
• Nominal size: 20 mm branch and run diameters
• Connection type: welded joint designed for butt or socket fusion using compatible welding tools
• Application temperature range: suitable for typical hot and cold water systems (follow system specifications for exact limits)
• Flow characteristic: smooth internal profile to reduce turbulence at the branch

How to use

Prepare pipes and fitting according to the welding tool manufacturer’s instructions: cut pipe ends square, remove burrs, and ensure surfaces are clean and free of contaminants. Align the pipe and tee precisely in the welding fixture, heat to the specified temperature for the material and nominal size, then complete the weld following the recommended heating and cooling times. Verify joint integrity visually and, where applicable, by pressure testing the system in accordance with local regulations and project requirements.

Usage recommendations

Use only welding equipment and parameters approved for PE-RT materials and 20 mm fittings. Store the fitting in a dry, shaded place to avoid contamination prior to installation. For systems carrying potable water or operating at higher temperatures, consult system design guidelines and local standards to confirm compatibility and maximum operating conditions.