Quick Answer: A whole house repipe in San Jose costs $8,000-$22,000 depending on home size and pipe material. Replacing galvanized steel with copper runs $12,000-$22,000. PEX repiping costs $8,000-$16,000 for the same home. Signs you need a repipe: rust in water, low water pressure throughout the home, frequent leaks, polybutylene pipes (gray plastic, common in 1980s-1990s homes).
Whole House Repipe in San Jose: Costs and When You Need It
Signs You Need a Whole House Repipe
- Rust-colored water: Brown or orange water from taps indicates corroding galvanized steel pipes. This is a health hazard — repipe immediately
- Low water pressure throughout the home: Galvanized pipes corrode from the inside, restricting flow over decades. If all fixtures have low pressure, the pipes are the culprit
- Frequent pinhole leaks: Copper pipes can develop pinholes after 50+ years, especially in areas with aggressive water chemistry. More than one or two leaks per year suggests systemic pipe failure
- Polybutylene (PB) pipes: Gray plastic pipes installed from 1978-1995. Nationally recalled for failing at fittings and causing catastrophic leaks. If your home has gray plastic supply pipes, repipe now.
- Lead pipes: In homes built before 1930, lead supply pipes may still be present. Replace immediately for health safety
Repipe Options: Copper vs PEX
| Material | Cost | Lifespan | Pros | Cons |
|---|---|---|---|---|
| Copper | $12,000-$22,000 | 50+ years | Industry-proven; does not leach chemicals; preferred by lenders | Higher cost; affected by aggressive water chemistry |
| PEX (cross-linked polyethylene) | $8,000-$16,000 | 50+ years | Lower cost; flexible (fewer fittings); freeze-resistant | Cannot be used outdoors (UV degrades PEX) |
| CPVC | $10,000-$18,000 | 30-50 years | Mid-cost; rigid; good for hot water | Can become brittle in California heat over time |
What to Expect During a Repipe
- Duration: 2-4 days for a typical 3-bedroom home in San Jose
- Water is shut off during work, but you have water again each evening
- Some drywall cutting is required (small access holes, not full wall demolition)
- Drywall patching is included as part of the repipe scope
- All work is permitted and inspected by the City of San Jose
Quartz Construction handles whole house repiping as part of full home renovations in San Jose. CSLB #1003436 | BBB A+ | 4.9 stars. Call (650) 749-7436 for a free plumbing assessment.
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Phone: (650) 749-7436
Address: 1777 Hamilton Ave #1080, San Jose, CA 95125
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