M.A. Stewart & Sons Ltd.

- The exclusive agent for our ball valves for North American Territories
(U.S.A., Canada and Mexico).

ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
ASTM - American Society for Testing and Materials
AWWA - American Water Works Association
NSF International
NSSN : A National Resources for Global Standards
API - American Petroleum Institute


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