Ouyao are a leading manufacturer and exporter in the pipe and plumbing industry. Our bestselling pipes and fittings include; Brass Fittings for cold and hot water supply, different kinds of mechnical parts for plumbing system. Our ability, however, is not limited to what you see illustrated here on our site. Our accomplished design and R&D technicians welcome custom product inquiries and work closely with our customers producing bespoke products. Ouyao products are tested beyond the ...