Concealed Installation Set SiGMA-Li SIGMA LI 16×1/2×150 PE-RT (tuluje)

Concealed Installation Set SiGMA-Li SIGMA LI 16×1/2×150 PE-RT (tuluje) is a compact kit for under-wall plumbing connections, intended for potable-water distribution and heating systems. The set features PE-RT pipe with a 16×1 mm wall/dimension and a 1/2-inch connection interface, presented as a 150 mm length segment that integrates into concealed installation boxes or wall cavities. It is designed to provide hygienic water delivery and reliable connection points for fixtures while remaining hidden behind plaster or service panels.

Advantages

The concealed installation set offers corrosion-resistant polymer piping and a standardized 1/2-inch connection that simplifies integration with common fittings. Its short 150 mm segment is suitable for precise in-wall placement and reduces the need for exposed junctions. Materials selected for PE-RT construction ensure flexibility during installation and long-term dimensional stability for potable water and heating applications.

Suitable for

• Under-plaster in-wall plumbing connections for sinks, showers and bidets
• Concealed supply lines in residential and commercial heating systems
• New construction and bathroom or kitchen renovations

Key specifications

• Pipe material: PE-RT (polyethylene of raised temperature resistance)
• Nominal pipe dimension: 16 mm outer diameter with 1 mm wall thickness
• Connection size: 1/2-inch interface compatible with standard fittings
• Segment length: 150 mm suited for concealed installation depth
• Application: potable water distribution and heating circuits

How to use

Install the concealed installation set by positioning the 150 mm PE-RT segment within the installation box or wall cavity so the 1/2-inch connection face aligns with the fixture outlet. Secure the pipe and any retaining elements according to local building rules and the installation box manufacturer instructions. Make joints using compatible fittings and approved jointing techniques for PE-RT, then pressure-test the system before closing the wall to verify leak-free connections.

Usage recommendations

For best results, follow local plumbing codes and use fittings rated for PE-RT systems. Protect the concealed segment from sharp edges during installation and perform a pressure test at recommended service pressure. Use this kit in environments where the concealed installation depth matches the 150 mm length and where thermal and mechanical loads are within PE-RT material limits.