If your home was built in the 1980s or 1990s, there’s a chance it could have polybutylene plumbing—and we’ve been getting a lot of questions about it lately. As Florida home inspectors, we regularly encounter this piping system and unfortunately, it often spells trouble for homeowners. In this post, we’ll break down what polybutylene is, why it’s a problem, how to spot it, and what steps you should take next.
What is Polybutylene Piping?
Polybutylene (often abbreviated as PB) is a type of plastic resin that was widely used in residential plumbing from the late 1970s through the mid-1990s. It was marketed as an inexpensive and easy-to-install alternative to copper piping. At the time, it seemed like a breakthrough material—but it didn’t take long for problems to emerge.
Why Is Polybutylene a Problem?
Polybutylene piping has a tendency to fail without warning. The material reacts poorly with oxidants commonly found in public water supplies, like chlorine. Over time, this reaction causes the pipe to become brittle from the inside out, eventually leading to cracking, flaking, and leaking.
Here’s why it’s a serious concern:
- Unpredictable Failures: Leaks can occur inside walls, ceilings, or under floors, causing significant water damage before you even notice a problem.
- Insurance Issues: Many insurance companies will not write new policies or renew existing ones on homes with polybutylene piping. Some may require full replacement before issuing coverage.
- Decreased Home Value: Polybutylene can be a red flag for buyers and may reduce your home’s resale value or complicate a sale.
How to Identify Polybutylene Piping
Not sure if your home has polybutylene? Here are some common indicators:
- Color: Typically gray, though it can also be silver, blue, or black
- Size: Usually 1/2″ to 1″ in diameter
- Markings: Look for “PB” followed by a series of numbers (like PB2110)
- Location: Often found near water heaters, under sinks, or at the main water shut-off valve
- Era: Most commonly found in homes built between 1978 and 1995
If you suspect you have PB piping, we recommend scheduling a professional inspection to confirm and document it.
What to Do If You Have Polybutylene
If your home has polybutylene, the safest long-term solution is full replacement with a modern, reliable piping material like PEX or CPVC. While this can be a significant investment, it can also prevent major water damage and ensure your home qualifies for insurance.
We can help you:
- Confirm the presence of polybutylene
- Provide documentation for insurance or real estate purposes
- Recommend next steps and trusted contractors if replacement is necessary
Learn About Modern Piping Materials
Curious about the alternatives to polybutylene? Check out our YouTube video where we walk through the four most common types of piping we see in modern Florida homes—Copper, PVC, CPVC, and PEX.
Serving Florida Homeowners with Honest, Thorough Inspections
Based in Sebastian and serving clients throughout Florida, we’re here to help you protect your home and your peace of mind. Whether you’re buying, selling, or simply maintaining your property, our home inspection services are designed to give you clarity and confidence.
Need an inspection or have questions about your home’s plumbing? Contact us today.