PEX Piping vs Copper: The Key Differences to Consider

When it comes to plumbing, one of the most common debates homeowners and contractors face is PEX vs copper plumbing. Both materials are widely used in residential and commercial plumbing systems, but each comes with its own set of advantages and drawbacks.

If you are trying to decide which material to go with, questions may be coming to mind, such as “Should I use copper or PEX?” or “Is PEX better than copper?” Below, we will help break down the key differences so you can make an informed decision for your plumbing system.

What Is PEX Piping?

PEX (cross-linked polyethylene) is a flexible, durable plastic piping that has gained popularity in plumbing applications over the last few decades. It is commonly used for water supply lines and radiant heating systems. PEX piping is available in different colors—red for hot water, blue for cold water, and white for general use—making it easy to identify in a system.

What Is Copper Piping?

Copper piping has been a standard in plumbing for more than a century. It is a metal pipe that is naturally resistant to corrosion, highly durable, and capable of withstanding high temperatures and pressure. Copper pipes come in different types, including Type M (thin-walled), Type L (medium-walled), and Type K (thick-walled), each used for different applications.

PEX vs Copper Piping: Key Differences

1. Installation & Ease of Use

PEX:

• Easy to install, requiring fewer fittings and able to bend around corners
• Lightweight and flexible, making it easier to work with in tight spaces
• Can be connected using push-to-connect fittings or crimping methods, requiring minimal tools

Copper:

• More labor-intensive, requiring precise cutting, soldering, and fittings
• Heavier and rigid, making installation more challenging in tight spaces
• Requires the use of a torch for soldering, which can be a fire hazard

Verdict: PEX is the easier and faster option to install, making it a preferred choice for DIYers and professionals alike.

2. Durability & Longevity

PEX:

• Resistant to corrosion and mineral buildup
• Does not burst when frozen, as it can expand and contract
• More susceptible to UV degradation, meaning it cannot be used outdoors
• Can be punctured more easily compared to copper

Copper:

• Extremely durable and can last for 50+ years
• Resists UV light, making it suitable for outdoor applications
• Naturally antimicrobial, preventing bacterial growth inside pipes
• Can corrode over time, especially in areas with acidic or high-mineral-content water

Verdict: While both materials are long-lasting, copper has a longer track record of durability.

3. Cost Comparison

PEX:

• Generally cheaper than copper
• Lower labor costs due to easier installation

Copper:

• More expensive due to fluctuating copper prices
• Higher labor costs due to complex installation

Verdict: PEX is the more cost-effective choice for most homeowners.

4. Water Quality & Health Concerns

PEX:

• Safe for potable (drinking) water use, but some concerns exist about chemical leaching
• Cannot be used in high-temperature water systems above 200°F
• Some PEX materials can absorb odors or flavors from water

Copper:

• Naturally antimicrobial, reducing bacterial growth
• Does not leach chemicals into water
• May release small amounts of copper into the water, which can be a concern in areas with acidic water

Verdict: Copper is generally preferred for those concerned about long-term water quality.

5. Freeze Resistance

PEX:

• More resistant to freezing due to its ability to expand and contract
• Less likely to burst in freezing temperatures

Copper:

• More likely to burst when frozen, leading to costly repairs

Verdict: PEX is the better option for cold climates due to its flexibility.

6. Environmental Impact

PEX:

• Made from petroleum-based plastic, which is not as environmentally friendly
• Difficult to recycle compared to copper

Copper:

• 100 percent recyclable and reusable
• More environmentally sustainable

Verdict: Copper is the more eco-friendly choice due to its recyclability.

Pros and Cons of PEX Plumbing

Pros:

• Easier and faster installation
• Lower material and labor costs
• Resistant to corrosion and mineral buildup
• Expands in freezing temperatures, reducing burst risks

Cons:

• Not UV-resistant and cannot be used outdoors
• Potential for chemical leaching into water
• Less durable against physical damage and can be punctured easily

Pros and Cons of Copper Plumbing

Pros:

• Long-lasting and durable for 50+ years
• Resistant to UV exposure and suitable for outdoor use
• Antimicrobial properties improve water quality
• Fully recyclable and environmentally friendly

Cons:

• More expensive than PEX
• Labor-intensive installation process
• Susceptible to corrosion in acidic water conditions
• Can burst when frozen

PEX vs Copper: Which Should You Choose?

The best choice depends on your specific needs.

Choose PEX if you want a budget-friendly, easy-to-install, and freeze-resistant solution for your home’s plumbing. Choose copper if you prefer a long-lasting, environmentally friendly, and naturally antimicrobial material that works well outdoors.

Both PEX and copper plumbing options have their strengths and weaknesses. If you’re still unsure, consulting a professional plumber can help you determine the best choice for your home’s plumbing needs.

Contact Christianson Air Conditioning & Plumbing for Expert Plumbing Services

Choosing PEX vs copper plumbing can be a challenging decision, but you don’t have to make it alone. At Christianson Air Conditioning & Plumbing, our experienced team is here to help you determine the best solution for your home or business. Whether you need PEX or copper pipe installation, or repairs, we provide reliable, high-quality plumbing services across Central Texas.

Contact us today to schedule a consultation or request a service appointment.