Yuhuan World Copper Co.,Ltd,is the specialized in producing each kinds of specification high quality backwater valves,plumbing valves,fittings and bathroom accessories specialized enterprise.We keep in developing advanced technology and utilizing advanced equipments to make superior products. To ensure that its products meet the strict quality levels demanded by its customers,company has successfully obtained certification of its quality control systems by ISO 9001:2000,CE,CSA,UPC etc.The ...