PP 45° Elbow Fitting SiGMA-Li KN4520 for 20 mm Pipes

SiGMA-Li KN4520 is a polypropylene (PP) 45° elbow fitting engineered for 20 mm pipes. It provides a compact and reliable directional change for plastic water and fluid lines, intended for domestic and light commercial plumbing systems. The fitting is suitable for use in supply, drainage and distribution circuits where a fixed 45-degree bend is needed to alter pipe routing without additional machining or complex connectors.

Advantages

The polypropylene construction offers chemical resistance and low weight while remaining durable under normal pressure conditions of water distribution systems. Its 45° geometry reduces flow resistance compared with sharper angled fittings and allows smoother changes in direction. The compact dimensions make it easy to fit in confined spaces and to integrate with standard 20 mm pipework. The part is simple to assemble and requires minimal maintenance.

Suitable for

• Domestic cold and hot water distribution (compatible with PP pipe systems)
• Light commercial plumbing and HVAC secondary lines
• Drainage and waste lines where a 45° directional change is required
• Retrofitting or modifying existing 20 mm PP installations

Key specifications

• Material: polypropylene (PP)
• Angle: 45 degrees
• Pipe connection size: 20 mm
• Function: fixed elbow for directional change
• Application: water and fluid piping in domestic and light commercial systems

How to use

Prepare the 20 mm pipe ends by cutting squarely and deburring to ensure a clean fit. Insert the pipes into the socketed ends of the elbow until fully seated according to the pipe system's installation guidelines. Use the appropriate joining method specified for polypropylene fittings in your system—such as solvent welding, fusion, or mechanical push-fit—following the manufacturer's recommendations for temperature, curing time and pressure testing. After installation, perform a pressure check and inspect all joints for leaks before commissioning.

Usage recommendations

Use this 45° elbow in applications compatible with polypropylene materials and within the pressure and temperature limits of the overall piping system. Avoid exposure to aggressive solvents or temperatures beyond the rating of PP. When routing near heat sources or under mechanical stress, provide adequate support and spacing to prevent deformation. For critical systems, consult installation standards or a qualified technician to confirm suitability and correct joining method.