AWWA C110/A21.10 – Ductile-Iron and Gray-Iron Fittings (3″ to 48″)
ASME B16.1 – Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250 (Flange surfaces shall be faced and drilled in accordance with ANSI Class 125)
AWWA C104/A21.4 – Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
AWWA C111/A21.11 – Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings
Ductile iron mechanical joint fittings 3″ through 24″ shall be rated for 350 PSI working pressure.
Flanged ductile iron fittings in 24 inch and smaller sizes may be rated for 350 psi with the use of special gaskets.
