What Materials Are Commonly Used for Repiping in Southern California?
Most repipes in Southern California use PEX (cross-linked polyethylene) or copper because they handle hard water, temperature swings, and local code requirements well.
Older materials like galvanized steel and polybutylene are outdated and prone to leaks. Pipe It Right Plumbing installs both PEX and copper systems, helping homeowners choose the best fit for their water, home, and budget.
The Most Common Repiping Materials
In SoCal homes, you’ll typically see four types of plumbing materials:
| Material | Average Lifespan | Pros | Cons |
| PEX (Cross-Linked Polyethylene) | 50+ years | Flexible, affordable, corrosion-resistant, quieter water flow | Not UV-resistant (indoor use only) |
| Copper (Type L) | 40-60 years | Long-lasting, heat-tolerant, traditional | Higher cost, pinhole leak potential with hard water |
| CPVC (Chlorinated PVC) | 40-70 years | Inexpensive, corrosion-resistant | Can become brittle over time, sensitive to heat |
| Galvanized Steel | 20-50 years | Durable (historically) | Rusts, clogs, and leaches metals. No longer recommended |
PEX and copper dominate modern repipes because they’re both approved under the California plumbing code and perform well in local conditions.
Why SoCal Homes Need Better Materials
Southern California’s hard water and high mineral content eat away at old galvanized and copper pipes faster than in most regions.
That’s why we often recommend PEX for newer builds or remodels, and Type L copper for homeowners who prefer a traditional metal system.
Both materials are:
- Code-compliant throughout California
- Resistant to corrosion and scaling
- Quiet under pressure changes
- Backed by long-term warranties
How to Choose the Right Material
Your ideal material depends on:
- Water quality: hard or mineral-heavy water leans toward PEX
- Budget: copper runs higher in cost but offers classic durability
- Accessibility: tight walls and attics favor flexible PEX
- Home age and structure: older homes may need copper for mixed fittings
During an in-home evaluation, Pipe It Right Plumbing will test water hardness, inspect existing lines, and recommend which material will last longest in your specific setup.
Code and Permit Considerations
In Southern California counties like Riverside, Orange, and San Diego, PEX and copper are fully permitted for residential use.
Our team always pulls the proper permits and meets local inspection requirements. No shortcuts, no gray areas.
That compliance is part of what keeps warranties valid and resale inspections smooth.
Quick Takeaways
- PEX and Type L copper are the top repiping materials for SoCal.
- Avoid galvanized steel or polybutylene if still present in your home.
- Hard water and age shorten pipe life; material choice matters.
- Always work with a licensed, insured contractor familiar with California code.
Ready to Find the Best Repipe Material for Your Home?
Not sure if PEX or copper is right for you? Pipe It Right Plumbing can walk you through each option and give you a quote that makes sense.
Located in Southern California?
Learn more about our repiping process or schedule an inspection today.