Why Homes with Old Galvanized Pipes Aren’t Good Candidates for Copper Retrofits
At first glance, replacing old galvanized pipes with copper sounds like a smart upgrade—copper is durable, resistant to corrosion, and meets modern plumbing codes. But if your home still has its original galvanized steel piping, a full copper retrofit may not be the right solution. At Brown Plumbing & Heating, we’ve seen firsthand why combining these two materials often leads to more problems than it solves.
The Issue with Mixing Copper and Galvanized Steel
When copper and galvanized steel are connected directly, they create what’s known as galvanic corrosion. This is an electrochemical reaction where one metal (usually the steel) corrodes much faster than it normally would. Even if you’re only replacing part of the system with copper, the remaining galvanized sections can deteriorate rapidly—leading to leaks, clogs, and expensive repairs.
Why Old Galvanized Pipes Are Already a Risk
Restricted Water Flow – Over time, galvanized pipes develop a thick scale buildup inside, reducing water pressure.
Internal Corrosion – Rust and mineral deposits can break free, discoloring your water.
Short Remaining Lifespan – Most galvanized pipes have a lifespan of about 40–60 years; older systems are often near the end of service life.
If these pipes are already fragile, introducing copper into the mix can accelerate their failure.
The Better Alternative: Full Repipe
Rather than doing a partial retrofit with copper, the most reliable long-term solution is a complete repipe using a single material—such as all copper or PEX. This eliminates galvanic corrosion risk and ensures consistent water quality and flow.
While a full repipe may seem like a bigger upfront investment, it can save you from multiple repair calls and water damage down the road.
Code Compliance and Best Practices
Modern plumbing codes require proper dielectric unions or fittings when dissimilar metals are joined. These fittings help reduce galvanic corrosion, but they aren’t a perfect fix—especially when the existing galvanized pipes are already compromised.
At Brown Plumbing & Heating, we follow Montana’s strict code requirements and always recommend the solution that provides the longest-lasting results for your home.
Is It Time to Replace Your Galvanized Pipes?
If you live in a home built before the 1970s, there’s a good chance galvanized pipes are still in place. An inspection can reveal whether your plumbing is a candidate for full replacement—and which material is best for your needs.
Contact Brown Plumbing & Heating today at https://brownplbg.com for an expert evaluation. We’ll help you choose a plumbing solution that’s safe, efficient, and built to last.
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