Why do plumbers not use copper anymore?

Author: June Torphy  |  Last update: Thursday, August 28, 2025

It has become expensive, can still corrode based on pH levels of water, and in cold climates, frozen water can cause copper pipes to burst.

Why are copper pipes not used anymore?

Copper pipes are pretty terrible. Copper reacts with minerals and chemical additives in the water. After a long time, the copper pipe will wear out. You end up with a leak.

What do plumbers use now instead of copper?

PEX Pipe. PEX, a cross-linked polyethylene pipe, is considered by some to be the greatest innovation for DIY plumbers. PEX pipes often replace copper for hot and cold water in residential retrofits. They are easy to cut, install and connect and less costly than copper.

Do plumbers prefer PEX or copper?

Copper is usually preferred for water supply lines and heating systems but plex is most often used for drain or waste lines because copper corrodes over time. Ultimately, it's up to the homeowner to decide where to spend the construction budget.

Why is copper piping not good?

The only downsides to copper are its cost, and the fact it's metal means it can be dissolved by aggressive water or corroded from excess condensation. Electrolysis can be an issue if it comes into contact with dissimilar metals or stray electric currents.

How to Stop Copper Pipe Corrosion | Ask This Old House

Why change from copper to PEX?

PEX pipe is not only cheaper than copper but more durable too. PEX is immune to corrosion and mineral build-up, and it's not affected by electrolysis, which can cause small pinhole leaks in copper piping. Copper pipes can last anywhere from six months to the life of a building.

What is the safest pipe for drinking water?

Copper has been a standard plumbing pipe material since the 1960s, and with good reason. First, copper is the preferred choice from a safety standpoint because it preserves drinking water quality. Unlike galvanized steel or cast iron, copper is corrosion-resistant and doesn't leach rust or sediment into the water.

What is the downside of PEX?

Like any other material, multiple factors could lead to problems with PEX. Some of these factors could be simple over-chlorination of the water running through it or dezincification, which could weaken and break down the fittings used on the piping. Another issue could be the piping failing to pass a pressure test.

Should I repipe my house with PEX or copper?

Copper is more likely to freeze and break.

The challenge arises more frequently in older homes needing more insulation. If you reside in a colder region or have experienced water pipe freezing, opting for PEX when it's time for a repiping endeavor is a wise choice.

Is it worth replacing copper pipes with PEX?

Better Energy Efficiency – PEX has a lower thermal conductivity rate than copper. As a result, PEX pipes can help keep hot water hotter for longer periods of time. They also produce less condensation on cold water lines, which could lead to fewer moisture-related problems in ceilings and walls.

Why do plumbers not use PEX?

Material Concerns: One of the primary concerns about Pex plumbing is the material itself. While Pex pipes are undoubtedly flexible, making them easier to install in tight spaces, they are not as durable as traditional materials like copper or even PVC.

What is the best material to repipe a house?

There's also stainless steel, which can be either flexible or rigid and is extremely resistant to corrosion but is even more expensive than copper. If you're planning on repiping your entire house, copper or PEX are going to be your best choices.

What type of pipe is not recommended for a water line?

PVC is most commonly used for drain, waste, and vent lines. It is not recommended for use in potable water lines because it can leach chemicals into the water.

Do you ever have to replace copper pipes?

If you're lucky, you might get all 50 years from your copper plumbing, but sometimes wear and tear happens quicker than you'd like.

Do they still build houses with copper pipes?

First, check the quality of those pipes, as copper is still the standard for piping and can offer a long-lasting plumbing system if the pipe is well made.

Which is healthier, copper or PEX?

Consumption of high levels of copper can cause nausea, vomiting, diarrhoea, gastric (stomach) complaints and headaches. Long term exposure over many months and years can cause liver damage and death. There are no health concerns affiliated with using PEX pipes.

How long will PEX plumbing last?

PEX: Due to its flexibility and durability, PEX piping should last at least 50 years. PVC / CPVC: Under typical conditions, these pipes should last up to 100 years. Keep in mind that PVC pipes are often used for drainage because extreme heat can damage them.

Why is PEX banned in California?

Currently, PEX plumbing is one of the most widely used plumbing systems around the world. It was temporarily banned in California for a while due to concerns about toxic materials but this was later disproven by laboratory tests.

Will mice eat PEX pipe?

PEX Pipe Is Vulnerable

Rodents Chewing Through PEX Pipe is a common problem in our area. It doesn't matter how old your home is, if you have an attic, you need to watch for rodent damage to PEX Pipe or PVC. If you're hearing rustling noises coming from the attic, it's time to do an inspection.

Where can you not use PEX?

Our PEX pipe is not suitable for use in areas where the soil is or may become contaminated, including soil used for backfilling. Soil used for backfilling must be free of rocks, debris or any sharp object that may cause damage to the fitting or pipe through impact or abrasion.

What pipes to avoid?

Polybutylene, Galvanized Steel, and Lead Piping: The Worst Plumbing Pipe Materials.

What is the longest lasting water pipe?

If it doesn't get damaged, PVC pipes will last forever. If you have high water pressure, PVC pipe is the best option. It's often used for the home's main water supply line for this reason. It's also a lightweight material that's much easier to work with than galvanized steel or copper.

Why can't you use PVC pipe for drinking water?

PVC is made with vinyl chloride, the same hazardous material released in the fiery train derailment that triggered a public health and environmental crisis in East Palestine, Ohio. It's also a known carcinogen and endocrine disruptor.

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