Choosing Between Copper and PEX for Repiping

When repiping a home, one of the biggest decisions is PEX pipe vs copper. Both materials are widely used in plumbing, but each has unique grades, costs, and lifespans that influence the best choice for your project.

If you’re considering a repipe and want expert guidance, Repipe1 has helped thousands of homeowners choose the best solution for their plumbing needs. Contact us today for a free consultation!

Copper Pipe Options

Copper has been the traditional choice for decades, thanks to its durability and proven track record. However, not all copper is the same. Homeowners choosing copper pipes have the option between Type M copper, Type L copper, and Type K copper.

Type M Copper

• Thinnest and least expensive grade.
• Shorter lifespan, typically 10–20 years depending on water quality, especially in areas with aggressive or acidic water.
• Best for homeowners seeking a lower upfront cost but not ideal for long-term durability.

Type L Copper

• Thicker walls and the most common choice for home repipes.
• Average lifespan of around 30–40 years, depending on water quality (high chloramine content can shorten its lifespan by eating away at the pipe internally).
• A reliable balance between cost and performance.

Type K Copper

• The thickest and longest-lasting copper pipe.
• Can exceed 70+ years in the right conditions.
• Often used for underground lines, high-pressure systems, and areas with aggressive water chemistry.

PEX Pipe Options

PEX (cross-linked polyethylene) is a newer material that has grown popular for residential plumbing due to its flexibility and resistance to corrosion. There are three main types:

PEX-A

• Most flexible type of PEX, making installation easier.
• Best at handling freezing conditions.
• Can be repaired if kinked.
• Considered the premium choice for whole-house repiping.

PEX-B

• Slightly stiffer and more affordable.
• Commonly used in new home construction.
• Provides a good balance of cost and performance.

PEX-C

• Least flexible and most brittle compared to A and B.
• Not generally recommended for whole-house repiping.

Copper vs PEX: Which Should You Choose?

When weighing PEX pipe vs copper, your decision often comes down to water quality, budget, and lifespan goals.

• Copper (Type K or L)
  • Best for homes with stable, non-acidic water chemistry, since copper can corrode in aggressive conditions.
  • Offers decades of proven durability, with many systems lasting 50 years or more.
  • Fire- and heat-resistant, making it safer in extreme temperatures or emergencies.
  • Naturally resistant to certain bacteria, helping maintain water quality.
  • More expensive and labor-intensive to install compared to PEX.
    
• PEX (especially PEX-A)
  • Ideal for homes with acidic or aggressive water since it won’t corrode like copper.
  • Flexible design allows for faster installation with fewer fittings and lower labor costs.
  • Quieter in operation and less prone to water hammer compared to rigid pipes.
  • More affordable overall, making it a budget-friendly alternative to copper.
  • Sensitive to UV light, so it can’t be used in outdoor or sun-exposed applications.

Final Thoughts

Both copper and PEX are excellent choices for repiping, but the right option depends on your home’s water conditions, budget, and how long you plan to stay in the home.

• Choose copper if you want a time-tested metal system and have good water quality.
• Choose PEX if you want a flexible, corrosion-resistant, and cost-effective solution.

By weighing these factors carefully, you’ll make a decision that ensures a reliable plumbing system for decades.

Get Expert Help with Your Repiping Project

Deciding between PEX pipe vs copper is easier when you have trusted experts by your side. At Repipe1, we specialize in whole-house repiping and have helped over 40,000 California homeowners upgrade their plumbing systems with confidence.

Whether you choose durable copper or flexible PEX, our licensed professionals ensure the job is done right on time and with minimal disruption to your home.

Contact Repipe1 today for a free consultation and discover the best repiping solution for your home.