Elbow 45° SiGMA-Li PP 25 mm BOR Plus K4525 — polypropylene pipe fitting

SiGMA-Li PP 25 mm 45° BOR Plus K4525 is a polypropylene elbow designed to change the direction of a 25 mm pipe run by 45 degrees. It is intended for plumbing and heating systems where a resistant, lightweight plastic fitting is required. The fitting is compatible with systems that use PP socket or weld connections and is suitable for potable water, heating circuits and general fluid distribution. The smooth internal surface reduces flow resistance and deposits, while the polymer construction provides chemical and corrosion resistance compared with metal alternatives.

Advantages

The polypropylene construction ensures low weight and resistance to corrosion and many common chemicals, while maintaining stable dimensions under normal operating temperatures for domestic plumbing and heating. The 45° angle allows more gradual directional changes than 90° elbows, reducing pressure loss and turbulence in the flow. The fitting is compatible with standard 25 mm PP connection methods and can be welded or joined by sockets according to the installation system used. Its smooth bore and uniform wall thickness support reliable flow characteristics and simplified installation.

Suitable for

• Potable water distribution in residential and commercial buildings
• Central heating circuits and radiator connections
• Domestic hot and cold water installations
• General fluid distribution in non-aggressive media

Key specifications

• Material: polypropylene (PP)
• Nominal diameter: 25 mm
• Angle: 45° elbow
• Connection method: socket/weld compatible with PP systems
• Application temperature range: suitable for typical domestic plumbing and heating (check system requirements)
• Internal surface: smooth bore to reduce flow resistance

How to use

Select the appropriate joint method for the SiGMA-Li PP 25 mm 45° elbow according to the installation system—socket fusion or welding where applicable. Prepare mating pipe ends by cutting square, deburring and cleaning surfaces to ensure proper fit and reliable joints. Assemble and execute fusion or socket connections following the equipment and material manufacturer instructions and local plumbing standards. After installation, inspect joints and perform pressure testing of the circuit as required to verify leak-free connections.

Usage recommendations

Use fittings made of polypropylene only within the temperature and pressure limits specified by the overall system design; avoid exposure to aggressive chemicals outside PP compatibility and follow local plumbing codes for potable water and heating systems. Store components in a dry, shaded area to prevent UV degradation before installation.