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The pipes are typically manufactured using a casting process, where molten iron is poured into molds and allowed to cool and solidify. This results in pipes with a smooth internal surface that facilitates the flow of waste water and reduces the likelihood of clogs and blockages.

Cast iron soil pipes and fittings come in various shapes and sizes to accommodate different plumbing layouts and building designs. Common fittings include bends, branches, couplings, and connectors, which are used to join pipes together and navigate around obstacles within the building structure.