ANSI/AWWA C11/A21 : 11-12 Rubber Gasket Joints for Ductile-Iron Pressure Pipe and Fittings ISBN: 9781613001905 Platform/Publisher: Ebook Central / American Water Works Assoc. Digital rights:Users: Unlimited; Printing: Limited; Download: 7 Days at a Time Subjects: Engineering: Mechanical; Engineering;