Houses in long-settled neighborhoods have usually been worked on more than once: a kitchen redone, a bathroom added, a section of pipe replaced after a leak. That history is why a burst pipe in this kind of home is often as much a question about the rest of the plumbing as about the one break.
What are your pipes made of?
You can often tell in a minute, where the supply line comes in near the water heater or meter.
- Copper is orange-brown when scratched, and a magnet won’t stick to it.
- Galvanized steel is gray, threaded at the joints, and a magnet sticks. It rusts from the inside, so you may notice low pressure or brown water first.
- Gray or blue flexible plastic may be polybutylene, which was widely installed from the late 1970s to the mid-1990s and is known for failing.
- White or cream rigid plastic is likely CPVC. Colored flexible tubing (red, blue or white) is typically PEX, the newer standard.
Mixed materials are common after remodels, and the joint where one meets another is where corrosion often starts. Tell the plumber what you found, because it changes how they approach the repair.
Pinhole leaks aren’t small problems
A pinhole in a copper pipe can spray a fine mist into a wall for days. You’ll see a stain, smell mildew, or notice a bill that keeps climbing. Our page on wall pipe leak repair goes through the signs and how plumbers find the source. If it’s the third or fourth pinhole in a few years, the plumber may suggest replacing the affected runs, which is worth asking about before another wall is opened.
What to do now
Close the main valve, open the lowest tap to drain the lines, and call. If you want the full first-aid list, it’s on our page about a local burst pipe plumber in Potomac. Take photos for your insurer before you start cleaning.
Comparable questions come up in Potomac Hills and Copenhaver, where we focus on different parts of the problem.
Questions people ask
How do I tell polybutylene from other pipe?
Is a pinhole leak worth a late-night call?
Should I replace all my pipes after one leak?
Burst pipe services you can ask for
Wall Pipe Leak Repair
Hidden leaks inside walls: damp drywall, stains, sound of running water.
Pipe Replacement / Repiping
Replacing worn-out or failing pipe, in part or the whole house.
Emergency Burst Pipe Repair
A split pipe or blown joint with water actively escaping.
A note on this guide. This page is general information, last reviewed October 2026. It can’t replace a plumber looking at your actual pipes, and Burst Pipe Fix Pros does not perform plumbing work.