... AWWA C110 .2, material : GGG500-7 or other Ductile iron . 3, coating : Fusion bonded epoxy coating ; cement ... fittings , double flange pipe, single flange pipe, push-on Tyton socket fittings , Ductile iron/PVC fittings, K type bolted gland fittings ... . AWWA C110 flanged pipe fittings ISO2531/BSEN545 ductile iron flanged pipe ...