sosoon was established in 2003 as Nanjing Huitong. Our focus is water drainage systems for the construction business. Within the first decade the company has succeeded in providing over 2000 syphon roof drainage system solutions all over China. sosoon today has offices in 15 major cities in China as well as a presence in India, South-East Asia, and Australia. sosoon engages in new product development for building drainage systems, design, production, technical consulting, construction, installation and after sales services. Our high quality products are made in three production units around Nanjing. We offer a full range of product systems with over 1000 different products. sosoon is dedicated to preserve the water resources of our planet with a complete set of products and services for the building construction industry.