Reducer SiGMA-Li R2520 25×20 mm PVC/PP plumbing fitting

SiGMA-Li R2520 25×20 mm PVC/PP plumbing fitting is a compact reducer designed to connect 25 mm and 20 mm plastic pipes in water supply and drainage systems. Made from polypropylene (PP), this fitting provides a secure, corrosion-resistant transition between different pipe diameters. The product is intended for use in residential and light commercial installations where a reliable plastic connection is required.

Advantages

The PP construction ensures chemical resistance and low weight while maintaining dimensional stability. Its compact design minimizes space requirements and simplifies routing in tight installations. The reducer offers consistent inner profile for stable flow characteristics and reduces the need for more complex fittings or custom adaptations.

Suitable for

• Connecting 25 mm to 20 mm plastic pipes in domestic water supply systems
• Small drainage and wastewater lines in residential buildings
• Light commercial plumbing where plastic pipe transitions are needed
• Repair work or retrofit projects requiring a compact reducer

Key specifications

• Material: polypropylene (PP)
• Connection sizes: 25 mm to 20 mm
• Type: concentric reducer for plastic pipe systems
• Application: water supply and drainage
• Construction: single-piece molded fitting

How to use

Before installation, verify pipe diameters and ensure pipe ends are clean, smooth and free of burrs. Push-fit or solvent-weld techniques may be used depending on the piping system and local practice; follow the recommendations for joining PP fittings applicable to your system. Insert the 25 mm pipe into the larger end and the 20 mm pipe into the smaller end with full engagement to ensure a secure connection. After installing, perform a pressure or leak test according to local codes to confirm sealing and alignment.

Usage recommendations

Use the reducer in systems within the manufacturer’s recommended temperature and pressure range for polypropylene fittings. Avoid exposure to open flame and prolonged UV irradiation; if the installation is outdoors, consider additional protection or compatible UV-stable components. For long runs or systems with significant mechanical load, provide appropriate support and avoid point loads on the fitting.