The purpose of cast iron drainage fittings is primarily for which type of systems?

Cast iron drainage fittings are primarily designed for gravity flow systems. These systems rely on the force of gravity to move wastewater and other materials through pipes and fittings. The rigidity and durability of cast iron make it particularly suitable for handling the weight and flow of liquids, allowing for effective drainage in both residential and commercial settings.

Gravity flow relies on proper slopes and angles in drainage systems to facilitate the movement of liquids, and cast iron is effective at maintaining these slopes due to its structural integrity. The material can also handle the thermal and chemical stresses that typically occur in drainage applications, ensuring longevity and reliability in the system.

While pressure flow, vacuum systems, and wind pressure systems utilize different mechanisms to transport fluids or gases, they do not typically rely on the same gravitational principles, making cast iron fittings less suitable for those applications. Therefore, understanding that cast iron fittings excel in accommodating the needs of gravity flow systems clarifies their primary purpose.