Hiwa Fittings (www.hiwaflow.com) is a professional pipe fitting production dept. of Tianjin Huihua Valve Industry Co., Ltd. (www.hiwa.cn). We are CE, WRAS, SGS and ISO9001 approved. Our main product line is as follows: 1) Ductile iron pipe fittings:Universal couplingsUniversal flange adaptorsRestrained flange adaptors & couplings for PE/PVC pipesDedicated flange adaptors and couplings for DI/STEEL pipesQuick flange adaptors for PVC/PE pipesSaddle clampsRepair clampsDismantling jointsBS EN545 / ISO2531 ductile iron pipes and pipe fittingsLoose flange DI pipe fittingsDuctile iron fittings for UPVC pipesRubber expansion jointsDuckbill check valvesHuihua is always enlarging. In 2002, we established Zibo Huihua Valve Industry Co. in Zibo New & High-Tech Industrial Park, Shandong Province, China, which runs perfectly in all aspects. In 2004, 33,350 square meters' new factory was built in Xiaozhan Developing District of Southern Tianjin City. 66,666.67 square meters' new factory is under construction in Binzhou City, Shandong Province, which shows that Huihua is always developing. Your requirements are Hiwa's responsibility!Huihua will always welcome you to visit us to realize our mutual benefits.