Zhejiang Taizhou Triunion Co., Ltd. As a member of Hongtu Group, is a union corporation, which specilize in producing & selling High Quality PVC Fittings, PVC Butterfly Valves, FRPP Ball Valve, PVDF Check Valve, PE Irrigation Fittings, PP-H Fittings, PP Compression Fittings, HDPE Fittings, SMC Composite Manhole Cover BS EN124 and Australian AS3996 Series Products with Hongtu Plastic Product Co., Ltd; Resin Chemical Co., Ltd; Yinyida Pipe and Fittings Co., Ltd.; Sanfa Plastic Co., Lt...View More