The Wavin Osma Solvent Overflow 1E346B 40mm x 21.5mm Reducer in Black is a high-quality PVC-U fitting designed to join overflow and waste pipes of different diameters. Ideal for domestic and commercial plumbing systems, this reducer ensures secure, leak-proof connections while maintaining smooth water flow. Constructed from durable, corrosion-resistant material, it offers long-lasting performance and straightforward installation for reliable overflow and drainage management.