AWWA C508:2001 pdf download AWWA C508:2001 pdf download.SWING-CHECK VALVES FOR WATERWORKS SERVICE, 2-IN. THROUGH 24-IN. (50-mm T... 12/30/2021AWWA Standards1172-IN. THROUGH 24-IN. (50-mm THROUGH 600-mm) NPS SWING-CHECK VALVES FOR WATERWORKS SERVICEComments Read more