The Polypipe WS16W 40mm Knuckle Bend 90° in white is designed to create a sharp 90° change of direction in drainage and push-fit plumbing systems. Engineered for reliable performance, it ensures smooth water flow and maintains joint integrity in domestic and commercial applications. Durable and easy to install, this knuckle bend provides long-lasting, professional-quality results for all plumbing and drainage projects.