Hiwa Fittings(www.hiwaflow.com) , the professional pipe fittings produce dept., which belong to Huihua Valve Co Ltd.(http://www.hiwa.cn) --- The CE,WRAS and SGS ISO9001 Approved Valve and Fittings Manufacturers in China. Our main line as the following: Ductile Iron Fittings: •Universal Coupling •Universal Flange Adaptor •Restrained Flange Adaptor & Coupling for PE/PVE Pipes-----New Products •Universal Flange Adaptor ,Universal Coupling •Restrained Flange Adaptor and Coupling for PE P...View More