Headquartered in Birmingham, Alabama, American's diversified product line also includes static castings and high performance fire pumps.

[1] In the 1920s, American developed a proprietary Mono-Cast centrifugal casting method and increased pipe diameters to 24 inches (610 mm).

By the mid-1930s, government spending on municipal water supplies, fire protection, and sanitation brought a resurgence in business.

A new melting system in 1972, including the largest cupola of its kind in the world, would supply the new iron for this pipe, and American would move from a Sand Spun casting process to a generation of deLavaud metal molds, still used today.

In the early 1980s American expanded its steel pipe business and acquired Waterous Company of St. Paul, Minnesota, to add fire pumps to its product line and increase market share in valves and hydrants.