Ductile Iron Flanged Fittings AWWA C110/A21.10
Our AWWA C110 ductile iron flanged fittings are manufactured and tested in full accordance with ANSI/AWWA C110/A21.10, the American Water Works Association standard for ductile-iron and gray-iron fittings for water and other liquids. Available from 3″ to 48″ (DN80–DN1200), they are rated for a working pressure of 250 psi (1,724 kPa), with 24″ and smaller sizes capable of 350 psi (2,413 kPa) when fitted with special gaskets.
As the industry's full-body fitting standard, C110 flanged fittings feature heavier walls and greater wall thickness than compact designs, providing extra structural margin for demanding installations. Flange facing and drilling conform to ASME B16.1 Class 125, ensuring direct compatibility with standard flanged valves, pumps, hydrants, and pipe — a key advantage for above-ground piping systems where bolted connections are required.
Cast from ductile iron conforming to ASTM A536, our flanged fittings deliver the strength and toughness of ductile iron with outstanding resistance to impact, vibration, and water hammer. Every fitting is 100% hydrostatically tested and finished with a durable protective coating, making them the trusted choice for municipal water treatment plants, pump stations, valve vaults, and industrial water systems.
- Full Standard Compliance — Manufactured to ANSI/AWWA C110/A21.10, guaranteeing dimensional accuracy and interchangeability with all major brands of flanged valves, pumps, and pipe.
- High Working Pressure — 250 psi (1,724 kPa) working pressure from 3″ to 48″; 350 psi (2,413 kPa) available for 24″ and smaller sizes with special gaskets.
- Superior Material — High-grade ductile iron per ASTM A536 (Grade 65-45-12 / 70-50-5), offering high tensile strength, ductility, and impact resistance.
- Standard Flange Drilling — Flange dimensions and drilling conform to ASME B16.1 Class 125, ensuring easy, bolt-compatible connections with standard equipment.
- Full-Body, Heavy-Duty Design — Thicker walls and heavier body construction than compact fittings, providing extra strength for severe service and buried installations.
- Complete Product Range — 90°, 45°, 22.5°, and 11.25° bends, tees, crosses, reducers, caps, and custom configurations to suit any piping layout.
- Flexible Joint Options — Available in flanged, mechanical joint (MJ), and push-on connections for maximum installation flexibility.
- Superior Corrosion Protection — Durable asphaltic or fusion-bonded epoxy exterior coating with optional cement mortar lining for long-term buried or exposed service.
- 100% Hydrostatically Tested — Every fitting is pressure-tested before shipment to guarantee leak-tight, reliable performance.
- Proven in Municipal Service — Widely specified for water treatment plants, pumping stations, valve chambers, and distribution networks worldwide.
