The founder and president, Woon S. Chan, founded GSAI Manufacturing Group with a vision to deliver a product line with greater value and higher quality to plumbing suppliers and contractors in the American plumbing industry.

Formerly a successful plumbing and fire protection systems contractor and real estate developer himself in the United States prior to GSAI, Woon realized the advantage that an economical and first-rate copper fitting line would bring to contractors, as well as improving the overall well-being of the plumbing industry as a whole. GSAI was founded on the principle to deliver first-rate quality copper fittings and superior value to contractors and suppliers in the plumbing industry.

In 1996, GSAI officially began selling its product lines in California, after many strenuous years of testing, careful research and development of its manufacturing capabilities. A domestic corporation registered in the State of California, GSAI Manufacturing Group produces and directly distributes copper fittings approved by the International Association of Plumbing and Mechanical Officials (IAPMO) and fully passes the American Standards for Pressure and DWV fittings. Our fittings are all rigorously tested by independent testing laboratories and by an IAPMO designated laboratory. We also have a factory laboratory and quality control/assurance group testing out each fitting as they are made, assuring quality and standard.

GSAI has always held true to its principle through countless capital investments in manufacturing and distribution facilities. We are centrally located to increase convenience and central distribution for our supply chain. Since the beginning, GSAI invested significantly in working capital improvements, distribution and storage expansion, and will continue to do so. Ultimately, GSAI is committed to bringing higher quality and value to the entire industry.
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