What Are Those Pipes Made Of? A Homeowner's Guide to Plumbing Pipe Types

Pipe material is one of the strongest predictors of what plumbing problems you’ll face, what they’ll cost, and whether a repipe belongs in your plans. Modern homes use copper or PEX for supply and PVC for drains — the good ones. Older Cherokee County homes may have galvanized steel (replace eventually), polybutylene (replace soon), or rarely lead (replace immediately).

We’ve worked on every one of these across Canton, Cherokee County, and North Georgia for 25+ years as a licensed Georgia Master Plumber operation — from new builds with PEX manifolds to farmhouses still running cast iron drains. Here’s how to identify what you have and how worried to be.

How to Identify Your Pipes

Look under sinks, in the basement or crawl space, and at the water heater:

• Color. Copper is bronze-orange, greening with age. PEX is red, blue, or white and flexible. PVC is rigid white; CPVC is cream. Galvanized is dull silver-gray with threaded joints. Polybutylene is flat gray.
• Joints. Soldered rings mean copper. Threaded means galvanized. Crimped metal rings mean PEX or polybutylene. Glued white joints mean PVC.
• Flexibility. If it bends, it’s PEX or polybutylene. Metal and PVC are rigid.

Older homes often carry a mix from decades of renovations. That’s normal — just know what serves which area.

Pipe Materials Compared

Copper and PEX: The Keepers

Copper fails two ways: pinhole leaks from acidic water over decades, and splitting in a hard freeze. Repeated pinholes suggest a water chemistry issue; otherwise repair and move on. PEX took over new construction in the 2000s — it resists corrosion entirely, tolerates freezing better than any metal, and retrofits through existing walls with minimal drywall damage. If you’re repiping, PEX is the practical default for most Cherokee County homes.

Galvanized Steel: The Slow Fade

Standard before the late 1970s, galvanized pipe corrodes from the inside — the zinc coating breaks down, rust and mineral buildup shrink the interior diameter, and you get falling pressure, rust-tinted water at first draw, and pinhole leaks at threaded joints. Most galvanized in Cherokee County is now past its 40–50 year design life. You don’t have to replace it all at once, but if pressure is dropping and leaks are repeating, a partial or full repipe is the honest answer. A leak that lets soil into the line or drops whole-house pressure is a water line repair call.

Polybutylene: The One to Know About

Used roughly 1978–1995, polybutylene reacts with chlorine in municipal water, turns brittle from the inside, and cracks — usually at fittings first. Look for flat-gray flexible pipe, often stamped “PB2110.” Plenty of Canton and Woodstock subdivisions built in that window still have it.

If you have polybutylene in 2026, it is past due to fail. Many insurers exclude water damage from it or won’t write the policy at all, and buyers’ inspectors flag it every time. The fix is a full repipe to PEX or copper — a real project at $5,000–$15,000+ depending on house size, which is exactly the kind of job financing through Wisetack exists for.

Cast Iron and Lead

Cast iron drains in 1950s–70s homes can run 75–100 years, but they corrode from the inside and the pitted walls catch debris. Recurring clogs in the same line, gurgling, or corrosion at joints mean the line is aging out — until then, leave it alone. Lead supply lines (soft, dull gray, scratches with a coin) are rare here but show up in pre-1960 homes. There is no safe level of lead in drinking water; replace on discovery.

When to Plan a Repipe

1. Polybutylene supply lines, any age — plan it now.
2. Galvanized over 50 years old with pressure loss, rust water, or pinhole leaks.
3. CPVC over 30 years old with repeating joint failures.
4. Lead, regardless of condition — immediately.
5. Major renovation with walls already open — the cheapest moment you’ll ever get.
6. Selling within 1–3 years — a repipe converts a buyer objection into a selling point.

A typical Cherokee County repipe runs $5,000–$15,000 and takes 2–5 days, with water off only a few hours each day. Because we run one crew for both plumbing and septic, we also catch drain-side and septic-side issues while walls and yards are open — no second contractor.

FAQ

How do I know if I have polybutylene pipes?

Look for gray flexible plastic pipe, usually 1/2-inch, with crimped fittings and markings like “PB2110.” Homes built or replumbed between 1978 and 1995 are the risk window. Check under sinks and at the water heater, or have us confirm on a service call.

Is PEX or copper better for a repipe?

For most homes here, PEX — cheaper, faster, more freeze-resistant, and it snakes through existing walls with minimal demolition. Copper still makes sense for high-end homes where tradition and resale perception matter.

Does galvanized pipe affect water quality?

Somewhat. Old galvanized sheds rust into standing water (that first-draw brown tint) and the internal buildup steals pressure. Very old systems with lead-soldered joints can add lead risk too.

Will a repipe increase my home’s value?

It typically returns 60–80% of cost at resale, but the bigger win is removing the objection — homes with known polybutylene or failing galvanized sit longer and draw lower offers.

Do you do repipes in Canton and Cherokee County?

Yes — partial and whole-house repipes throughout Canton, Woodstock, Holly Springs, and Ball Ground, usually quoted at a fixed price within a day or two of your call.

Not sure what’s behind your walls? Contact us or call (678) 758-3493 and Precision Plumbing & Septic will identify your pipe material and give you a straight answer on whether it’s fine, watch-list, or replace.