... ,BS4772 4)Strength,Durability,Safe,Long life 1.Ductile cast iron fittings produced according to ISO2531, EN545, BS4772, EN598, AWWA ... standards.2. Material: Ductile iron 3. Inside with cement mortar lining / FBE coating ( fusion bonded epoxy coating)4. Outside painting ... zinc and then plus bitumen / FBE coating.5. Fittings: All flanged tee, ...