Cast Iron sewer pipes are long-lasting and durable, but they can be prone to corrosion and damage over time. Replacing them with PVC can be a cost-effective and long-lasting solution. PVC pipes are resistant to corrosion and are easier to install, meaning there will be less disruption to the surrounding landscape.
The decision to replace cast iron pipes with PVC should be done after careful consideration. Factors such as cost, disruption, and the condition of your existing pipework should be taken into account before making a decision. Consulting an experienced plumber is the best way to ensure you make the right decision for your situation.