Pipe fitting Uponor S-Press PLUS coupling with internal thread 20 mm - Rp 3/4F

The Uponor S-Press PLUS coupling with internal thread 20 mm - Rp 3/4F is a press-fit transition fitting designed to join plastic piping to threaded components. Intended for potable water and heating systems, the 20 mm coupling provides a reliable mechanical and sealed connection where a female Rp 3/4 thread interface is required. The fitting is compatible with press installation tools and press jaws designed for the S-Press PLUS range, allowing rapid, consistent joint formation without the need for soldering or adhesives.

Advantages

This coupling offers secure, leak-resistant joints through press technology and a corrosion-resistant construction suitable for water and heating installations. The integrated female thread simplifies connections to radiators, valves and other threaded components while maintaining the advantages of plastic piping systems such as low thermal conductivity and resistance to scale. Press installation reduces on-site labor time and provides consistent joint quality when used with recommended presses and inspection procedures.

Suitable for

• Transition connections between plastic pipes and Rp 3/4 threaded valves or radiators
• Domestic potable water distribution systems
• Central heating circuits and radiator connections
• Installation scenarios requiring fast press-fit assembly and reliable sealing

Key specifications

• Connection type: press-fit on pipe side and internal female thread on the component side
• Pipe dimension: 20 mm outer diameter
• Thread specification: Rp 3/4 female
• Material characteristics: corrosion-resistant suitable for potable water and heating media
• Installation method: press technology compatible with S-Press PLUS tooling

How to use

Prepare the plastic pipe by cutting square and deburring the end, then insert the pipe fully into the coupling until it reaches the defined stop. Position the press jaws around the fitting’s press sleeve according to the press tool manufacturer’s instructions and perform the press operation to form the permanent joint. After pressing, verify the formed joint visually and, where applicable, perform a pressure test of the system in line with applicable installation standards and local regulations.

Usage recommendations

Use only approved S-Press PLUS press jaws and compatible pressing equipment. Verify compatibility of pipe material and dimensions before assembly. Follow local plumbing codes and the manufacturer’s installation guidelines for pressure testing and system commissioning.