Because modern PVC and PEX pipes are much more efficient and easier to work with.
These days PVC pipes are faster and easier to fit and in many ways more efficient than cast iron.
Less conductive I would say.
Iron pipes are made of iron.
Iron pipes are made of iron.
because the pipes don't rust as easy, and silver and gold are too expensive. That is another persons answer. Here are the main 3 reasons plumbers use copper pipes. Copper pipes are relatively non-toxic-unlike lead. Copper pipes do not suffer corrosion-as iron does. Copper pipes are relatively soft and easy to work with-unlike both iron and lead. However more and more homes are now using the plastic pipe such as Pvc and Cpvc which seems to serve the same purpose and are also safe, although both can be used, you still need to find out what code calls for in your city or town an abide by it.
Pipes are no longer made from iron because iron is prone to corrosion and rusting, which can contaminate water and reduce the lifespan of the pipe. Instead, pipes are now commonly made from materials like copper, PVC, or stainless steel, which are more resistant to corrosion and offer longer-lasting performance.
Bags of magnesium are attached to iron pipes to prevent corrosion of the pipes. The magnesium acts as a sacrificial anode, meaning it corrodes instead of the iron pipe, thereby protecting the pipe from rusting and extending its lifespan. This process is known as cathodic protection.
At the time of the Roman Empire, the Romans used pipes made of lead, because it is a cheap metal that is easily worked into pipes, and which unlike iron doesn't rust. The Romans didn't worry about lead poisoning. Lead pipes continued to be used even into the mid 20th century, before we became more concerned about the danger of lead poisoning.
The cost of replacing cast iron pipes in a residential property can vary depending on factors such as the size of the property, the extent of the plumbing system, and the location. On average, homeowners can expect to pay anywhere from 2,000 to 15,000 for this type of project. It is recommended to get multiple quotes from licensed plumbers to get an accurate estimate for your specific situation.
Steam carrying pipes
Iron rusts easily when combined with water, and drain pipes have water flowing through them. If iron was used, the pipes would rust within a few days.
galvanized water lines, cast iron drain lines, sometimes lead pipes, terracotta or clay pipes, and in rare cases wooden pipes.