The answer to 'which is better PVC pipe or cast iron pipe' is that PVC pipe is generally the better choice for most residential plumbing applications. PVC (polyvinyl chloride) pipe is more affordable, lighter, and easier to install than cast iron pipe. It is also corrosion-resistant and has a longer lifespan, often lasting 50 years or more with proper installation and maintenance.
Cast iron pipe was commonly used in older homes but has several drawbacks. It is heavier and more difficult to work with, making installations more labor-intensive. Cast iron is also prone to corrosion over time, which can lead to leaks and reduced water flow. While cast iron is durable, it is typically more expensive than PVC and may require more frequent repairs or replacements.