Alkotest K9050 KOLANKO 90° fi50 — Alkotest K9050 plumbing elbow 90-degree, inner diameter 50 mm

Alkotest K9050 KOLANKO 90° fi50 is a 90-degree plastic plumbing elbow designed to join two sections of pipe with an inner diameter of 50 mm. Intended for use in sewer, drainage and waste systems, this fitting offers a smooth internal profile to reduce flow disturbance and lower the risk of blockages. It is compatible with standard 50 mm PP/plastic pipe installations and provides a compact right-angle change of direction for building drainage and repair tasks.

Advantages

The elbow delivers a precise 90° turn while maintaining a consistent internal surface to help preserve flow rate and minimise sediment accumulation. Its construction ensures reliable alignment between connected pipe sections and simplifies installation in confined spaces. The product is suitable for replacement and retrofit situations as well as new installations where a standard-dimension plastic elbow is required.

Suitable for

• Sewer and waste piping runs with 50 mm inner diameter plastic pipes
• Drainage connections in residential and light commercial buildings
• Repair and retrofit of existing plastic plumbing systems
• Routing pipelines around obstacles where a 90° change is needed

Key specifications

• Angle: 90 degrees for right-angle directional change
• Inner diameter: 50 mm suitable for standard 50 mm plastic pipe systems
• Material: polypropylene/plastic compatible with PP systems
• Internal surface: smooth profile to reduce clogging and flow resistance
• Application: sewer, drainage and waste piping

How to use

Prepare the pipe ends by cutting squarely and de-burring to ensure a flush fit. Align the elbow with the pipe sections and insert each pipe into the fitting to the required depth according to the pipe system’s joining method (socket, glue, or push-fit as appropriate). Ensure correct alignment at 90° and verify seals where adhesive or rubber gaskets are used. After assembly, check the joint for leaks by running water through the system and inspect accessibility for future maintenance.

Usage recommendations

Use with compatible 50 mm PP/plastic pipe and follow the pipe manufacturer’s guidelines for jointing methods and solvent or sealing materials. Do not subject the fitting to mechanical loads beyond normal piping support; allow for thermal expansion in long runs and provide access points for inspection and cleaning to minimise blockage risk.