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.

Product Development

Our R&D team in Nanjing selects materials and technologies for new products to provide safe and durable products that are the best in the market. sosoon has been guiding important Chinese national construction standards in the field of water drainage systems.

System Design

Our team of 40 application engineers design complete solutions for every construction project. Our software for syphon system dimensioning is specifically developed by sosoon.


Our three factories sites around Nanjing are the largest HDPE drainage pipes and fitting production facilities in China dedicated to construction material. Our processes are ISO9001 certified since 2005.


Our approach to your water draining needs goes beyond design and delivery of drainage system products. We also support you in the installation either with our own team of specialists or by training and supervising your local team.


   Our Projects


   HDPE Key Features


Surfaces Division

Samsung Staron | Tempest | Silestone |
3M Di-Noc | 3M Fasara | Bisazza | Interface Carpets | Hunter Douglas Blinds

Sanitary & Bath Fittings
Viega | Roca | Supergrif | Lladro | Gem | Sosoon