Alkotest KN4525 PP elbow connector 45° DN25 (fi25) for drainage and piping

Alkotest KN4525 is a polypropylene (PP) 45° elbow connector with a nominal diameter DN25 (fi25) designed for drainage and piping systems. The fitting provides a compact and smooth directional change for plastic plumbing installations and is suitable for use in waste, sewage, and ventilation runs where a 45-degree bend is required. Manufactured from PP material, the connector is compatible with DN25 PP piping and intended for non-pressurized gravity drainage and ventilation applications.

Advantages

The Alkotest KN4525 offers corrosion resistance and chemical stability typical of polypropylene, ensuring long service life in drainage conditions. Its 45° geometry reduces turbulence and clogging risk compared with sharper bends, supporting reliable flow in sewage and waste lines. The connector is lightweight and easy to handle, allowing straightforward alignment during installation and reducing labour time for routing pipework in confined spaces.

Suitable for

• Residential and commercial waste water drainage systems
• Sewage and soil pipe assemblies with DN25 PP pipes
• Ventilation runs and non-pressurized exhaust ducts
• Retrofit or repair work where a gentle 45° directional change is needed

Key specifications

• Material: polypropylene (PP)
• Angle: 45 degrees
• Nominal diameter: DN25 (fi25)
• Application type: drainage, sewage, ventilation (non-pressurized)
• Connection type: socket/solvent or push-fit compatible with DN25 PP piping (depending on system)
• Color: product typical for PP plumbing fittings

How to use

Before installation, verify that mating DN25 pipes are clean and free of debris. Align the elbow to achieve the required 45° change in direction and ensure correct insertion depth according to the piping system's instructions. For solvent-weld or adhesive systems, apply the recommended primer and adhesive evenly to both pipe and fitting surfaces and hold the joint until set. For push-fit systems, insert the pipe fully into the socket and confirm an audible or tactile engagement. After assembly, inspect joints visually and, where applicable, perform a leak test with water to confirm correct sealing.

Usage recommendations

Use the Alkotest KN4525 in gravity drainage and ventilation circuits only. Avoid exposure to sustained high temperatures above typical polypropylene limits or to aggressive solvents not compatible with PP. During installation, follow the pipe system manufacturer's guidelines for joint preparation and curing times to ensure reliable, durable connections.