Zhejiang Huangyan Liutong Plastic Co., LTD was established in 1994. Through many years' development and innovation, now, As the one of the largest manufacturers in East-South of China, Liutong Plastics specialized in PVC products, such as PVC Resin, PVC-U (Unplasticized polyvinyl chloride) drainage pipe and fittings, PVC-U water-supply pipe and fitting, Rigid conduit and fittings, plastic lined steel piping and fittings, plastic valves, Fire stop device, cpvc tube for high voltage electric ...