REHAU transition coupling with internal thread 40 to Rp 1/2 SDR 11 LX

REHAU transition coupling with internal thread 40 to Rp 1/2 SDR 11 LX is a mechanical adapter engineered to join RAUPEX/PEX plastic piping (SDR 11) of 40 mm outer diameter to a Rp 1/2 female threaded fitting. The coupling provides a sealed connection between polymer pipe systems and standard threaded components used in plumbing, heating and potable water installations, enabling integration of plastic distribution lines with valves, fixtures or metal pipework.

Advantages

The coupling features a compact design compatible with RAUPEX/PEX SDR 11 tubing and a female Rp 1/2 thread, allowing a direct transition without additional brazing or complex fittings. It is intended to create a reliable mechanical joint that resists leakage when installed according to manufacturer instructions. The component supports potable water and heating system applications and is suitable for use where plastic-to-thread interfaces are required.

Suitable for

• Joining 40 mm SDR 11 RAUPEX/PEX pipe to Rp 1/2 threaded valves or fittings
• Domestic and commercial potable water distribution lines
• Heating system circuits where PEX pipe meets threaded components
• Repair or retrofit work connecting plastic pipe to existing threaded fittings

When it may not be suitable

This transition coupling is designed specifically for RAUPEX/PEX SDR 11 with a 40 mm pipe size and a Rp 1/2 female thread; it is not suitable for pipes with different SDR ratings, outer diameters or non-PEX materials. Applications requiring higher pressure ratings, special chemical resistance, or connections to metric thread standards other than Rp should be evaluated against the relevant system requirements.

Key specifications

• Pipe compatibility: RAUPEX/PEX SDR 11, 40 mm outer diameter
• Thread type: Rp 1/2 internal (female) thread
• Model series: LX coupling designed for transition between plastic pipe and threaded fittings
• Intended use: potable water and heating systems

How to use

Prepare the RAUPEX/PEX pipe by cutting squarely and ensuring the end is clean and free of burrs. Install the coupling according to REHAU installation instructions for SDR 11 systems: insert the pipe to the required depth, secure the mechanical connection as specified, and tighten the Rp 1/2 threaded mating component using appropriate sealing method for the thread if required by the system (for example, thread sealant or tape compatible with potable water). Verify alignment and perform a pressure/leak test following local codes and manufacturer recommendations before handing the system over to service.

What to consider before purchase

• Confirm pipe material and SDR rating: must be RAUPEX/PEX SDR 11, 40 mm
• Verify the mating threaded component uses Rp 1/2 internal thread
• Assess system pressure, temperature ranges and approvals required for potable water or heating use
• Ensure compatibility with existing fittings, valves and installation tools

Usage recommendations

Use with RAUPEX/PEX systems installed according to REHAU guidelines. Follow local plumbing codes for thread sealing and pressure testing; employ trained installers to ensure reliable long-term performance.