What Florida Homebuyers Should Know About Plumbing Inspections in Older Homes

Hidden plumbing problems in older homes, here in Florida, can lead to costly repairs if not identified early. Plumbing is one of the most essential systems in any home, but in older homes built before the 1990s, age, materials, and deferred maintenance can create real concerns for buyers.

Here’s what you need to know about plumbing in older homes, what to look for during a walkthrough, and how an inspection can help you make a confident and informed purchase.


Why Plumbing in Older Homes Deserves a Closer Look

Our warm, humid climate, high water tables, and storm exposure all impact the long-term health of a home’s plumbing. In older properties, we often encounter:

  • Outdated or recalled piping materials

  • Hidden leaks or corrosion

  • Clogged or deteriorated drain lines

  • Low water pressure due to mineral buildup

  • Inadequate or unsafe plumbing modifications

Some of these issues are easy to spot—but others require professional inspection tools and experience.


What Buyers Can Watch for During a Walkthrough

While most plumbing systems are hidden behind walls and under floors, there are several telltale signs you can look for when touring a home:

1. Check Under Sinks and Around Toilets

  • Look for water stains, mold, or rotting wood under cabinets.

  • Check for loose fittings or outdated flexible supply lines.

2. Run Faucets and Showers

  • Watch for low water pressure or inconsistent temperature.

  • Listen for noisy pipes or prolonged gurgling in drains.

3. Inspect Visible Pipes

  • Note the pipe material. Gray plastic (polybutylene), galvanized steel, and copper with green corrosion are red flags.

  • Any signs of pinhole leaks, rust, or mineral buildup could indicate bigger problems.

4. Walk the Yard

  • If the home has older cast iron drain lines, look for soggy patches or foul odors in the yard—this could mean root intrusion or broken pipes underground.

Common Problematic Plumbing Materials in Florida Homes

Some materials used in older homes are now known to be unreliable:

  • Polybutylene: 

Found in homes from the late 70s to mid-90s. These pipes degrade over time and can rupture without warning.

  • Galvanized Steel: 

Corrodes internally, reducing water pressure and increasing leak risk.

  • Cast Iron: 

Common in homes built before 1975. These underground drain lines can rust from the inside out and are costly to replace.


Inspections That Help Uncover Plumbing Issues

There are several  inspections that can help homebuyers assess the health of a property’s plumbing system. Here are some, especially for older homes:


  • General Home Inspection

Examines all accessible plumbing components—pipes under sinks, water heaters, fixtures, visible drain lines, and the main water shut-off. Any leaks are noted, poor water pressure, corrosion, or outdated materials.


  • Sewer Scope Inspection

A camera is sent through the home’s main sewer line and can help detect blockages, tree root intrusion, and collapsed or cracked drain lines.


  • Moisture Intrusion Inspection

Uses thermal imaging and moisture meters to detect hidden leaks behind walls or under floors that aren’t visible during a walkthrough.


  • Water Quality Testing 

In homes with well systems or outdated plumbing, testing for contaminants such as lead, bacteria, and excessive minerals.


Evaluates the plumbing system along with electrical, HVAC, and roof condition—required by many insurance companies in Florida for homes over 30 years old.


Why This Matters for You as a Buyer

Plumbing problems can be expensive—not just in repairs, but in hidden water damage and mold that can go unnoticed for years. A thorough inspection gives you a full picture of the plumbing system’s condition, and can:

  • Help you negotiate repairs or credits with the seller

  • Lets you plan for future maintenance or upgrades

  • Prevent you from inheriting unexpected and costly water damage

  • Help ensure your family’s safety and health

Bottom Line

If you're considering an older home in Florida, don’t leave the condition of the plumbing system to chance. Get an inspection that will  help you understand exactly what you’re buying—both the visible features and the systems behind the walls. This will help tremendously in making an informed decision.


We’re Here To Help

Feel free to call us if you have questions at 407-319-4608. You may also schedule your inspection or find additional information on our website.


*Image from Shutterstock