What Is Galvanized Plumbing?

When you take a shower or operate appliances in your home, your plumbing is one thing you probably don’t think about until there’s a problem. However, if your home was built before 1970, you may have some hidden challenges to deal with, such as galvanized pipes. Whether you’re buying an older home, tackling a renovation or just curious about your plumbing system, understanding galvanized plumbing is important.

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So, what is galvanized plumbing, and why should you worry about it?

What Is Galvanized Plumbing?

Galvanized pipes are steel pipes coated with zinc to prevent rusting. Inexpensive and durable, these pipes were commonly used in homes built prior to the 1960s. Before galvanized steel was used, many homes had lead pipes. However, lead pipes were replaced because lead is harmful when ingested.

Why Don't They Install Them Anymore?

Over time, the galvanized coating in plumbing pipes is degraded by hard water. The coating wears down, and the pipes underneath start to corrode, contaminating drinking water.

Galvanized pipes are also much heavier than PVC or PEX pipes. The extra weight makes it hard to install them in tight and elevated locations.

How Can I Tell If My Home Has Galvanized Pipes?

It’s important to note that even homes built as late as 1980 may have galvanized pipes. Fortunately, there are a few ways to tell if you have them in your plumbing system. Start by checking the pipes in your basement, crawlspace or where the pipes enter your home near the shut-off valve or water meter. If they're painted, lightly scratch the surface to see what color they are. If your pipes are plastic or have a copper appearance, they're newer materials. Galvanized pipes have a gray or metallic appearance.

You can also test galvanized pipes with a magnet. Galvanized steel will attract a strong magnet.

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Should I Replace My Pipes If They Are Galvanized?

Galvanized pipes start rusting from the inside out, so at first, you may not even realize you have a problem. If you’ve confirmed your home has galvanized steel plumbing, it’s a good idea to replace it. However, there are a few signs to look for that indicate you need to make the switch as soon as possible.

Signs of Pipe Rust

Look for noticeable signs of rust around joints and on the outside of pipes in your crawl space or basement. As galvanized pipes age, they'll show signs of rust and corrosion. Replacement is necessary to prevent water contamination and even burst pipes.

Discolored Water

Fill a clear glass with water from the tap. If it appears discolored or has a metallic taste, it could be due to rust buildup inside the pipes. Discolored water leaves stains on white porcelain that can be difficult to clean.

Low Water Pressure

Monitor the water pressure throughout your home. If some taps have lower water pressure than others, it could be a sign of galvanized pipes. The buildup of corrosion and rust inside pipes prevents water from flowing freely.

Age of Plumbing

If you have an old home, it’s a good idea to schedule a plumbing inspection every year. A professional plumber looks for any signs of wear and tear and makes recommendations on upgrades or replacements of galvanized pipes. They'll also make any necessary adjustments to prevent larger repairs.

Renovating Your Home? Upgrade Your Old Pipes

If you’re planning a major bathroom or kitchen renovation, you may want to upgrade your plumbing. Upgrading to modern materials will increase the overall value of your home and improve plumbing efficiency.