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IAPMO IGC 312-2018a
Gate, Globe, Angle, and Check Valves
This Standard covers gate, globe, angle, and check valves in sizes NPS-1/8 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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International Association of Plumbing and Mechanical Officials [iapmo]
