Copper vs plastic pipes: Explaining the difference

Modern plumbing systems can use a combination of plastic and copper pipes – but what is the difference? In this blog, we’ll compare the advantages and disadvantages of each and give examples of common usage around the home.

What are copper pipes? 

Copper pipes were introduced in the 1920s and are now a mainstay of household plumbing. Used for both water supply and central heating systems, these metal pipes come in different thicknesses depending on their use.

Copper rose to popularity due to its corrosion resistance and is considered a more traditional material, particularly for exposed pipework.

Advantages of copper pipes 

Here are some of the main advantages of copper pipes:

• Durable and long-lasting

• Resistant to UV exposure

• Handle high temperatures well

• Less likely to warp

• Recyclable material

• Often perceived as a premium or traditional option

Disadvantages of copper pipes

The disadvantages of copper pipes are:

• More expensive than plastic

• Can corrode over time depending on conditions

• Installation is more labour-intensive

• Less flexible

• Can be noisier due to expansion and contraction
  

Where are copper pipes commonly used? 

Copper pipes are commonly used throughout domestic plumbing systems for hot and cold water supply. They connect to boilers, radiators, taps and showers, carrying water around the property. They often run through walls and under floors, and are used in central heating systems due to their ability to handle high temperatures.

What are plastic pipes?

Plastic pipes made from synthetic polymers are an alternative to copper and are used to transport hot and cold water throughout the home. They are also commonly found in wastewater and drainage plumbing.

Plastic pipes first appeared in the 1950s and became popular in the following decades due to their low cost, flexibility and ease of fitting.

Advantages of plastic pipes 

The main advantages of plastic pipes are:

• Lower cost

• Faster installation

• Flexible and lightweight

• Resistant to corrosion

• Quieter water flow

• Fewer joints required

Disadvantages of plastic pipes

The disadvantages of plastic pipes include:

• Can expand and contract more

• Vulnerable to UV exposure

• Can be perceived as less durable

• Can be damaged more easily if improperly installed

Where are plastic pipes commonly used? 

Today, plastic pipes are commonly used in modern plumbing systems, particularly for hot and cold water supply. They are widely found in central heating setups, including underfloor heating, due to their flexibility. 

Plastic is also standard for waste and drainage systems, especially in uPVC form. In newer homes and renovations, plastic pipework is often run through hidden spaces, like walls, floors, and ceilings, for quick installation.

Key differences between copper and plastic pipes

Copper vs plastic pipes is a common consideration for homeowners. One of the main factors is appearance, and copper pipes are usually the choice for any area where plumbing is exposed, such as connections to radiators or pipework which cannot easily be hidden under floors or through walls.

Plastic pipes, on the other hand, are much cheaper and easier to install. Their corrosion resistance, flexibility and long lifespan make them a popular choice in modern homes. However, they can expand and contract more than copper and are vulnerable to UV exposure.

Copper is generally more durable and better suited to high temperatures, while plastic pipes are often quieter.

A qualified plumber will be able to advise you on the best type of pipes to suit the job at hand.

Can you mix copper and plastic plumbing pipes?

It doesn’t always have to be a choice between copper vs plastic pipes. In fact, many plumbing systems in UK homes use a combination of the two, with plastic used for hidden plumbing and copper for areas where pipework is exposed.

They are typically joined using specialist fittings, such as push-fit or compression connectors, which are designed to connect metal and plastic pipes safely.

Summary

Whether copper or plastic, it’s always important to ensure that all components used meet current UK water safety standards and regulations. 

WaterSafe registered plumbers, fully qualified in water regulations, can advise you on the best materials for the job and ensure the pipework is installed safely and correctly.

If you need new or replacement pipework for your home, WaterSafe Register’s free online search facility can help you find a qualified and competent plumber for the job.

Click here to start your search: https://www.WaterSafe.org.uk/approved_contractors/