The answer to 'which is better PVC pipe or cast iron pipe' is that both materials have their advantages, and the best choice depends on the specific needs of your plumbing project. PVC (polyvinyl chloride) pipe is generally more affordable, lightweight, and easier to install than cast iron pipe. It is commonly used for residential and light commercial applications, such as drainage, waste, and vent (DWV) systems. Cast iron pipe, on the other hand, is more durable, long-lasting, and better suited for heavy-duty commercial or industrial applications. It is also more resistant to fire and physical damage.
When choosing between PVC and cast iron pipe, consider factors like the location, pipe size, budget, and expected lifespan of the plumbing system. PVC may be the more cost-effective choice for DIY projects or smaller residential jobs, while cast iron is often preferred for larger, more complex plumbing systems that require higher levels of durability and safety.