Uponor S-Press PLUS reducing tee PPSU 20-25-20

Uponor S-Press PLUS reducing tee PPSU 20-25-20 is a press-fit reducing tee manufactured from PPSU (polyphenylsulfone) for use in potable water and heating pipe systems. The fitting connects two 20 mm branch pipes to a 25 mm run, providing a secure, corrosion-resistant transition with the S-Press PLUS press connection method. It is designed for use in press-fit plumbing systems where dimensional reduction and reliable, leak-free joints are required.

Advantages

The PPSU construction offers high mechanical strength, temperature resistance and long-term dimensional stability in domestic and light commercial installations. The S-Press PLUS connection ensures a consistent press profile for reliable joints and reduced installation time compared with traditional soldering or threaded fittings. The fitting is corrosion-resistant and suitable for potable water applications, minimizing maintenance needs and preserving water quality.

Suitable for

• Residential potable water distribution systems
• Heating systems with press-fit connections
• Installations requiring a reduction from 25 mm to two 20 mm branches
• Light commercial plumbing where corrosion resistance is important

Key specifications

• Material: PPSU (polyphenylsulfone)
• Connection type: S-Press PLUS press connection
• Dimensions: branch x run x branch — 20 mm × 25 mm × 20 mm
• Application: potable water and heating systems
• Properties: corrosion-resistant, high temperature and mechanical resistance

How to use

Ensure pipes are cut square, deburred and free of dirt and grease before assembly. Mark insertion depths on the pipes according to Uponor guidance and insert the pipes fully into the S-Press PLUS reducing tee. Use the appropriate S-Press PLUS pressing tool and jaws sized for 20 mm and 25 mm connections; perform the press operation following the tool manufacturer’s instructions to achieve a complete press profile. After pressing, verify the joint visually and with any recommended testing procedures such as pressure testing the system in accordance with applicable standards.

Usage recommendations

Use compatible Uponor S-Press PLUS jaws and press tools, maintain recommended insertion depths, and follow local plumbing codes. Avoid exposing the fitting to aggressive chemicals or direct UV for prolonged periods. Perform pressure and leak tests after installation to confirm system integrity.