Bell-and-spigot cast iron pipe is primarily used for what type of installations?

Bell-and-spigot cast iron pipe is primarily designed for use in underground installations, which makes it particularly suited for sewer and drainage applications. This type of pipe features a bell-shaped end that allows for the insertion of a spigot end from another section of pipe, facilitating a secure and leak-resistant joint. The strength and durability of cast iron also provide excellent resistance to external soil pressures and other environmental factors, making it ideal for underground use.

In contrast, options such as above-ground plumbing, electrical conduit, and HVAC ductwork typically require different materials that may offer better flexibility, corrosion resistance, or thermal insulation properties suited to their specific applications. For instance, above ground plumbing usually utilizes materials like PVC or copper, which are lighter and easier to install compared to cast iron. Electrical conduits often rely on non-metallic or galvanized steel materials, while HVAC systems typically use sheet metal or insulated ductwork to help manage airflow and thermal efficiency.