The Wavin Osma SquareLine 4T836W Drain Adaptor in White is designed to seamlessly connect 100mm SquareLine gutters to round downpipes, ensuring efficient rainwater flow. Made from high-quality, weather-resistant PVC-U, this adaptor provides a secure and leak-free connection. Suitable for both residential and commercial gutter systems, it simplifies installation while maintaining compliance with BS EN 607:2004 standards.