Some common materials used for fire protection systems fittings include: Cast Iron Durable, heavyweight iron commonly used for fittings like elbows, tees, crosses, reducers. Provides reliability in high pressure fire systems. Ductile Iron Stronger and less brittle than cast iron. Used for a wide variety of fire protection system fittings. Steel Used for fittings, pipes,… Continue reading What are some common materials used for Fire Protection Systems fittings?