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IAPMO Z1157-2014e1
- Ball Valves
- standard by International Association of Plumbing and Mechanical Officials, 2015
- Publisher: IAPMO
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This Standard covers ball valves in sizes NPS-⅛ to NPS-4, with minimum rated working pressures of 860 kPa (125 psi) at 23°C (73°F), intended for use in water supply and distribution systems and specifies requirements for materials, physical characteristics, performance, testing and markings.
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