Cast-iron piping and PVC are the most commonly used materials for sanitary drainage and venting in commercial construction. Both have pros and cons. Here is a list of applications where cast-iron piping is recommended:
Cast-Iron Piping Applications
High Temperature Applications
First, we recommend cast iron for high-temperature environments. This includes commercial kitchens, boiler drains, and similar areas. PVC piping has a rated limit of 140°F, which cast iron can exceed. However, consider drainage acidity in some applications.
High-Rise Buildings
Next, cast iron works well in tall buildings. It withstands high pressures and resists fire. Therefore, it is ideal for vertical stacks (vent and soil stacks).
Fire Rating Requirements
Additionally, PVC is not allowed (unless wrapped) in areas with flame/smoke spread limitations, such as return air plenums. Accordingly, we typically prefer cast iron as a solution.
Historical Renovations
Cast-iron piping may be required to maintain the original aesthetic and historical integrity in historical renovations or buildings with specific architectural requirements.
Noise Reduction
Finally, cast-iron pipes dampen noise and vibrations. Use them for hotels, hospitals, and residential buildings where noise reduction is a priority.
Heavy-Duty Applications
Opt for cast-iron pipes when applications require high load-bearing capacity and resistance to mechanical damage, such as under slab plumbing in industrial settings.
Conclusion
In summary, we prefer cast-iron plumbing piping in situations where its durability, fire resistance, noise reduction capabilities, and suitability for specific applications outweigh the higher material and installation costs compared to other materials like PVC. Compliance with local building codes and regulations plays a significant role in determining when we mandate or recommend cast iron piping for plumbing systems. Reach out to our plumbing engineer experts at EVstudio, and we can assist in determining the appropriate use of cast-iron plumbing for your project.
