The Wavin OsmaSoil 2S399W 40mm Ring Seal Boss Adaptor in White is a premium PVC-U fitting designed to provide secure ring seal connections between soil and waste pipes. Suitable for both domestic and commercial plumbing applications, it ensures leak-free performance and reliable installation. Manufactured to BS EN 1329 standards, this adaptor offers long-lasting durability, making it ideal for repairs, maintenance, or new plumbing installations, and providing efficient drainage solutions for soil and waste systems.