How to choose the brand of concealed water tank?

Only WDI- Vidya and Geberi are specialized in making water tanks. Most of the other brands are OEM. Xiamen Weidia (WDI) is a world-class and Asia's largest bathroom accessories solution expert, specializing in the production of water parts. Founded in 1995, it is a Sino-US joint-venture large-scale bathroom accessory manufacturer, headquartered in Xiamen, China, and has four marketing centers (Xiamen, Hongkong, USA and Switzerland) and branches around the world. It has an international standard in the field of bathroom fittings: independent research and development, and has obtained more than 3 patents at home and abroad, and its product quality and innovation ability have reached the international leading level, with customers all over the world. The quality of bathroom customers is self-evident, such as international brands such as TOTO, Duravit, Lao Fen, Kailema, and domestic brands are numerous.