Compression Adapter ALFA RK 20 mm to 1/2" male (model 601520)

Compression adapter ALFA RK 20 mm to 1/2" male (model 601520) is a coupling component designed to connect 20 mm polyethylene (PE) pipe to standard 1/2" male threaded fittings. The adapter provides a compression-style joint on the PE side and a male threaded connection on the other, enabling secure transitions between plastic distribution lines and metal-threaded valves, taps, or fixtures in plumbing and heating systems.

Advantages

The adapter offers a compact design that simplifies the transition from PE pipework to 1/2" threaded components without the need for additional fittings or complex tools. Its compression mechanism ensures a tight, leak-resistant connection when installed according to instructions. The combination of plastic-compatible compression and standard metal threading makes the fitting versatile for a range of installations where a reliable interface between plastic tubing and threaded fixtures is required.

Suitable for

• Connecting 20 mm PE supply lines to 1/2" threaded valves and taps
• Domestic plumbing repairs and extensions
• Heating circuits where PE pipe meets metal-threaded components
• Utility and service connections for water distribution

Key specifications

• Pipe connection type: compression fitting for 20 mm polyethylene (PE) pipe
• Thread type: external 1/2" male thread compatible with standard 1/2" female fittings
• Material compatibility: designed for use with PE piping and metal-threaded fixtures
• Application area: plumbing and heating installations for water distribution
• Connection method: compression seal on pipe side, threaded seal on fittings side

How to use

Prepare the 20 mm PE pipe by cutting the end square and removing any burrs. Slide the compression nut and compression ring (if separate) onto the pipe, insert the pipe fully into the adapter body until it seats, then tighten the compression nut by hand and finish with a suitable spanner to secure the joint without over-tightening. Apply appropriate thread sealant or tape to the 1/2" male thread before connecting to the female threaded valve or fixture, then tighten to achieve a leak-free connection. Follow standard installation practices for PE pipework and ensure the assembled joint is accessible for inspection.

Usage recommendations

Use the adapter within the intended temperature and pressure ranges of the connected piping system. Avoid excessive torque on the compression nut to prevent deformation of the PE pipe; if a persistent leak occurs after correct installation, inspect the pipe end for damage and replace the compression ring if applicable. When joining to metal fittings, ensure compatible materials and appropriate thread sealing methods are used to maintain long-term leak resistance.