The Wavin OsmaW ABS Bend 90° BK 40 (5Z161B) is a robust 40 mm 90‑degree drainage elbow designed for reliable soil and waste pipe installations. Constructed from durable ABS plastic, this black bend fitting provides secure solvent weld connections in domestic and commercial plumbing systems. Ideal for above‑ground drainage and waste pipework requiring a smooth directional change, it offers long‑lasting performance and dependable joint integrity for plumbers, builders and DIY enthusiasts.