Content Description
This standard describes only iron-body swing-check valves, 2-in. through 48-in. (50-mm through 1,200-mm) NPS, with mechanical-joint or flanged ends that are installed in approximately level settings in source water, potable water, wastewater, and reclaimed water systems having a pH range from 6 to 12 and a temperature range from 33 F to 125 F (0.6 C to 52 C). The manufacturer should be consulted for special conditions. Check-valve sizes described in this standard are 2, 2-1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30, 36, 42, and 48-in. (50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 750, 900, 1,050, and 1,200?mm) NPS. Sizes refer to the nominal diameter of the waterway through the inlet and outlet connections and the seat.
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About AWWA
Established in 1881, the American Water Works Association is the oldest and largest nonprofit, scientific and educational organization dedicated to safe and sustainable water in the world. With more than 50,000 members worldwide and 43 Sections in North America, AWWA advances public health, safety and welfare by uniting the efforts of the entire water community. AWWA Offers education to water professionals Advocates for safe and sustainable water Collects and share knowledge Creates volunteering opportunities