Ductile iron pipe resembles what other type of pipe?

• A. PVC Pipe
• B. Cast Iron Pipe
• C. Steel Pipe
• D. Concrete Pipe

Answer: (B)

Ductile iron pipe resembles Cast Iron Pipe. Both are iron-based pipes used in pressurized water distribution and share similar sizes, fittings, and installation methods. Ductile iron was developed to improve toughness over traditional cast iron by adding nodular graphite, giving it greater ductility and resistance to brittle failure while preserving the strength and long service life of iron pipes. Because of these similarities in material family, performance, and typical applications, ductile iron pipe is commonly described as resembling cast iron pipe. The other materials—PVC (plastic), steel, and concrete—differ in composition and behavior, so they don’t resemble ductile iron pipe as closely.