Water Leak Detection & Repair in Portland, Oregon
A hidden water leak can run for months before you see any visible damage — and by then, the mold, rot, and structural damage are already well underway. True Flow Plumbing locates and repairs leaks in Portland homes using pressure testing and acoustic detection, without tearing your house apart to find it.
Leak Detection for Portland Homes
Portland's older housing stock — particularly the 1910s–1950s homes in inner SE, NE, and NW neighborhoods — is where we find the most hidden leaks. Galvanized pipes develop pinhole leaks after 50+ years. Cast iron drain lines crack and weep. Early copper from the 1950s and 1960s corrodes faster than modern alloys, especially where water chemistry was not managed. A wet ceiling, a mold smell, or a water bill that's suddenly higher than usual are often the first signs.
🔍 Hidden Pipe Leaks
Supply line leaks inside walls, under floors, or in crawl spaces — found with pressure testing and acoustic equipment, not guesswork.
🏠 Slab Leaks
Pipes that fail beneath a concrete slab are one of the most damaging leaks in any home. We locate the exact spot before we touch the concrete.
📍 Pinhole Leaks
Pinhole leaks in cast iron, galvanized, and early copper are common in pre-war bungalows and mid-century homes. They weep slowly — barely noticeable until the drywall is soaked or mold appears.
🚿 Fixture & Supply Line Leaks
Leaks at shutoff valves, supply lines under sinks and toilets, and fixture connections — diagnosed and repaired in one visit in most cases.
💧 Main Line Leaks
A leak in the service line between the street and your house can go undetected for months. Signs: wet yard, high water bills, low pressure everywhere.
🌡️ Thermal & Acoustic Detection
We use acoustic listening equipment and thermal imaging to find leaks without invasive opening of walls or floors before we know where the problem is.
Signs You Have a Hidden Leak in Your Portland Home
- Water bill is higher than usual with no change in usage
- Sound of water running when all fixtures and appliances are off
- Wet, soft, or discolored spots on walls, ceilings, or floors
- Mold or mildew smell without any visible water source
- Low water pressure throughout the house
- Warm or hot spots on the floor (slab leak indicator)
- Your water meter is spinning with everything shut off
How We Find Leaks in Portland Homes
- Pressure test the supply system to confirm an active leak and isolate it to hot or cold lines
- Acoustic listening equipment to hear water escaping through pipe walls, even under concrete
- Thermal imaging to spot temperature differentials caused by wet materials behind walls
- Isolate sections of the system to narrow down the location before opening anything
- Provide a written summary of what we found, where it is, and what it costs to repair
Portland Neighborhoods We Serve
Frequently Asked Questions
How do you find a hidden water leak in a Portland home?
We start with a pressure test to confirm an active leak in the supply system, then use acoustic listening equipment to narrow down the location without opening walls or floors until we know exactly where to cut. This saves you from unnecessary demolition and repair costs.
What are the signs of a hidden pipe leak in Portland?
A water bill that jumped without a change in usage, the sound of running water when everything is off, wet spots on walls or ceilings, a mold smell without visible water, and unexplained low pressure are the most common signs. Any one of these is worth a call.
Do you repair the leak the same day you find it?
In most cases yes — we come prepared to both locate and repair. Simple pipe repairs and fitting replacements are handled the same visit. More involved slab leak repairs may require a follow-up, but we'll tell you exactly what you're looking at before we schedule anything.
Does homeowner's insurance cover leak detection and repair in Portland?
Most policies cover sudden and accidental pipe failures, including the cost of accessing the leak (opening walls, cutting into a slab). They typically don't cover gradual leaks that went unreported. Document everything and call your insurance company as soon as you discover a leak — we can provide a written report of our findings if needed.
Also see: Emergency Plumber Portland → | Repiping Portland → | Water Heater Portland → | Sump Pump Portland → | Trenchless Sewer Portland →
Suspect a Leak in Your Portland Home?
Don't wait for visible damage. We find hidden leaks fast and tell you exactly what it costs to fix before we start.