Written on: February 9, 2026
If you own a home in Marshfield, MA, or the surrounding South Shore towns, you likely appreciate the unique charm and history of the area. However, older homes often come with outdated materials hidden behind the walls.
One of the most common issues in houses built before the 1960s is the presence of galvanized steel pipes. While these pipes were the standard for decades, they are now a ticking time bomb for plumbing failures and water quality issues.
Understanding the condition of your plumbing is essential for protecting your property value and ensuring the safety of your water. If you aren’t sure if your pipes are galvanized or if they need to be replaced, this guide breaks down the risks and the signs that it’s time for an upgrade.
Galvanized pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion. For much of the 20th century, they were a popular alternative to lead pipes.
While they were effective for a time, the zinc coating isn’t permanent. Over decades of exposure to water, the protective barrier wears away, exposing the steel underneath to moisture and oxygen.
Once that barrier is gone, the steel begins to rust from the inside out. Since you cannot see the interior of your plumbing, the damage often goes unnoticed until significant problems arise.
The primary issue with galvanized piping is that it was not designed to last forever. Most of these pipes have a lifespan of 40 to 50 years. Considering many homes in Massachusetts were built well past that timeframe, most galvanized systems are now living on borrowed time.
Rust and corrosion: As the zinc coating deteriorates, rust accumulates inside the pipe. This internal corrosion constricts the diameter of the pipe, much like a clogged artery. This leads to a significant drop in water pressure throughout the home. You might notice that your shower slows to a trickle when the washing machine is running, or that water takes a long time to fill the bathtub.
Water quality issues: Corrosion doesn’t just affect water flow; it affects water quality. As rust builds up, it can flake off into your water supply. This often manifests as discolored, brownish-yellow water, particularly if a faucet hasn’t been used for a few days. Beyond the unsightly appearance, this sediment can stain porcelain sinks, bathtubs, and laundry.
The risk of lead: Perhaps the most concerning aspect of galvanized pipes is the potential for lead exposure. While the pipes themselves are steel, the zinc coating used in older manufacturing processes often contained lead. Furthermore, if your galvanized pipes are connected to a lead service line, the corrosion inside the galvanized pipes can “trap” lead particles, releasing them into your drinking water over time.
Replacing a home’s plumbing system is a significant renovation, but leaving deteriorating pipes in place can lead to catastrophic leaks, water damage, and health hazards. You should consider replacing your pipes if:
Upgrading your plumbing system enhances your home’s value, improves water pressure, and ensures your family has access to clean, safe water. It also provides peace of mind, knowing that you aren’t waiting for an inevitable leak to damage your property.
If you suspect your home still utilizes outdated piping, you don’t have to tackle the assessment alone. Williams Energy provides complete plumbing services, whatever your plumbing needs are.
From inspecting your current system to performing full replacements, our team helps homeowners in Marshfield and the South Shore maintain safe, efficient, and reliable homes. Contact us today to learn more about our plumbing services.