
As winter approaches, the cold can put significant strain on your plumbing system. A frozen pipe may seem like a minor problem at first, but
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A hidden leak rarely announces itself until the damage is already done, a warped floorboard, a spike in your water bill, or a musty smell that won’t go away. MT Dunn Plumbing tracks down leaks at their true source, whether they’re behind a wall, under a slab, or buried in your yard, and repairs them correctly the first time. Our technicians combine listening equipment, moisture sensors, and hands-on experience to stop water loss fast and protect your home from further damage.
Our highly experienced plumbing professionals will contact you for a free estimate and consultation.








Customers across Hillsboro rely on MT Dunn Plumbing for honest, dependable plumbing services. The team is known for providing timely service, clear communication, and quality workmanship. From simple repairs to complete plumbing upgrades, they work hard to deliver solutions that meet every customer’s needs.
EXCELLENT Based on 95 reviews Posted on Google RubenTrustindex verifies that the original source of the review is Google. Late Sunday night we had an emergency leak, where we were forced to shut off water to entire house. I reach out MT Dunn plumbing and in a short notice and within 35 mins Irich was able to come over and fixed our leak. Truly appreciate the quick response especially being late Sunday night around 9-10pm!!!Posted on Google Matt CorradoTrustindex verifies that the original source of the review is Google. We inadvertently discovered our kitchen and washing machine drains were disconnected and dumping water underneath the house, in the crawlspace. We may never know why or for how long but Irich responded to my call personally and set a date within a single business day knowing we'd couldn't use the kitchen until it was fixed. He was here on time and had it repaired in a half day. Proper invoicing and estimates based on labor and parts always makes me happy. So glad to have a plumber now. I won't go anywhere else.Posted on Google Nick A.Trustindex verifies that the original source of the review is Google. I have used MT Dunn many times, mostly smaller projects. Usually available within 24-48 hours. Always professional and courteous. Wouldn’t hesitate to use them again!Posted on Google MTrustindex verifies that the original source of the review is Google. Excellent service start to finish. Arrived on time, responded quickly to request. Very friendly and professional. Everything handled with care and expertise. Shower head repair. Hillsboro Area.Posted on Google Zari MootzTrustindex verifies that the original source of the review is Google. This is the 3rd time we've used M T Dunn Plumbing, and the 3rd time we've have a 5-star experience. I would recommend them to everyone!Posted on Google Rie JacobsTrustindex verifies that the original source of the review is Google. Irich is very easy to work with and always shows up on time. He’s honest, professional, and very efficient. His work is fast but never rushed. He does things the right way and never cuts corners. Over the past three years, he has helped us three times: installing a water heater, replacing some toilet parts, and installing a new toilet. Every job was done quickly and professionally. He’s also very respectful of our home and keeps things clean while working. On top of that, he’s a genuinely kind person—even great with our dog 🐶 His pricing is fair and he never overcharges. It’s hard to find someone this trustworthy. I highly recommend him. Thank you Irich!Posted on Google Brian SecrestTrustindex verifies that the original source of the review is Google. I've had MT Dunn plumbing handle a couple of plumbing issues we've had over the last few years. Our most recent visit was due to a leaking valve going to our guest bathroom toilet. It was stripped and Irich was able to fix it in short order. Friendly, transparent, punctual, and knowledgeable. We highly recommend Dunn plumbing and Mikes son Irich.Posted on Google Cooper HowardTrustindex verifies that the original source of the review is Google. This is the second time I’ve used M T Dunn Plumbing and both experiences have been great. I recently discovered I had a leaky pipe underneath my cement driveway. M T Dunn came out and assessed the situation and gave me multiple ways get it fixed with varying costs. I decided what I wanted to do and they came out a few days later and took care of it. They cut a hole in the cement, found the leak, fixed it and patched the driveway in a single day which will end up saving me a ton of money. They’re very fair and have gotten things done quickly and easily both times I’ve needed them.Posted on Google philip salvadorTrustindex verifies that the original source of the review is Google. Very upfront on pricing, finished the work as expected.Posted on Google Daniel CruzTrustindex verifies that the original source of the review is Google. Irich is great and excellent work and did same day service..I would highly recommend mt plumbing for anyone
Finding a leak takes more than guesswork, and fixing it right takes real expertise. Here’s what we bring to every job.
Accurate Source Detection
We locate the true origin of a leak instead of chasing surface symptoms.
Non-Destructive Methods First
Acoustic and moisture-sensing tools help us avoid unnecessary demolition whenever possible.
All-System Coverage
From supply lines to drain pipes to slab leaks, we handle every type of leak repair.
Water Damage Awareness
Technicians flag secondary risks like mold or structural damage during every repair visit.
Same-Day Scheduling
Most leak calls are seen the same day, since delays only make water damage worse.
Upfront Repair Estimates
You'll know the plan and cost before we open a wall or cut into flooring.
Skilled Reconstruction Coordination
We can guide you toward trusted contractors for any drywall or flooring repairs needed afterward.
Insurance-Friendly Documentation
Detailed findings and photos support your claim if the leak involves water damage.
Licensed, Insured Technicians
Every repair is performed by trained professionals who stand behind their work.
Hillsboro Homeowner Trust
Years of resolving leaks throughout the area's mix of older and newer homes.
Combined, these strengths make MT Dunn Plumbing the team Hillsboro homeowners call when something just doesn’t feel right with their water system.
We follow a focused process built around finding the real problem before touching a single pipe.
Technicians start by asking about water bill changes, visible dampness, unusual sounds, or any areas of the home that feel warmer, cooler, or softer than normal.
Before using any equipment, we inspect visible plumbing, fixtures, ceilings, and flooring for early clues pointing toward the leak’s general area.
Specialized listening devices amplify the sound of water escaping under pressure, helping technicians narrow down the leak’s location without unnecessary digging or wall removal.
Where sound alone isn’t enough, moisture meters and thermal imaging reveal temperature differences and dampness patterns hidden behind walls or under flooring.
Once the leak’s location is confirmed, technicians shut off water to the isolated section, minimizing water loss while repairs are prepared.
We open only the smallest area necessary, whether that’s a small drywall section, a floor tile, or a targeted excavation point for underground lines.
Technicians examine the pipe itself, checking for pinhole leaks, corrosion, joint failure, or damage from nearby construction or ground movement.
Depending on severity, we repair the specific damaged section or replace a longer run of pipe if surrounding material shows signs of similar wear.
After the repair, the line is pressure tested to confirm the leak is fully resolved and no additional weak points remain nearby.
Water service is safely restored, and technicians walk you through what caused the leak, what was repaired, and any next steps for damage recovery.
Most straightforward leak repairs in Hillsboro are completed within one to two hours, while slab or underground leaks may require additional time for access and excavation.
We understand that commercial plumbing leaks can disrupt operations and increase costs, so we use an organized repair process to restore your plumbing quickly while minimizing downtime.
Our goal is to complete every commercial plumbing leak repair efficiently, safely, and with minimal impact on your daily business operations.
Reach out if you notice any of these warning signs:
From what we’ve seen, the answer is clear: don’t wait. At MT Dunn Plumbing, we’ve found that even the smallest plumbing leaks can lead to significant water damage when they’re left unchecked.
A slow drip behind a wall, beneath a floor, or under a concrete slab rarely stays a minor issue. Water continues to spread into hidden areas, damaging framing, insulation, drywall, flooring, and even creating conditions for mold growth. What appears insignificant today can quietly become a costly repair tomorrow.
We’ve responded to many service calls where homeowners delayed scheduling an inspection because the leak seemed minor or the only sign was a slightly higher water bill. By the time we located the problem, hidden water damage had already affected floors, walls, or the home’s foundation. In many of those cases, an earlier repair would have been much simpler, faster, and less expensive.
We especially recommend prompt inspections for older homes with copper or galvanized piping. As these materials age, they’re more susceptible to corrosion and pinhole leaks that often develop in concealed areas before becoming noticeable.
If something doesn’t seem right, whether it’s an unexpected increase in your water bill, damp spots, unusual sounds, or unexplained moisture, don’t wait for the problem to get worse. A professional leak inspection today can prevent a much larger and more expensive repair tomorrow.
Every successful leak repair begins with an accurate inspection. We match each inspection finding with the most effective repair solution to restore your plumbing system efficiently and prevent recurring problems.
Inspection Finding
Corroded pipe section
Loose pipe fitting
Worn pipe joint
High water pressure
Hidden wall leak
Cracked water supply line
Damaged pipe seal
Multiple aging pipes
Action Taken
Replace damaged section with approved, durable piping materials.
Tighten or replace fitting to eliminate active water leaks.
Install new sealed connection for lasting leak protection.
Recommend pressure regulator to prevent future pipe failures.
Perform targeted repair with minimal wall disruption possible.
Replace affected section and restore normal water service.
Install new code-compliant seals and verify leak-free performance.
Recommend strategic replacements for long-term plumbing reliability.
By customizing every repair to our inspection findings, we provide dependable leak repair solutions that protect your Hillsboro property and plumbing system for the long term.
Fast Response • Upfront Pricing • Guaranteed Work
MT Dunn Plumbing provides dependable leak detection and repair services in Hillsboro, OR, helping homeowners and businesses find hidden leaks quickly and resolve them with lasting, precise repairs.
Active leaks can escalate quickly, and our team is built to respond without delay.
Priority Emergency Response
Active or worsening leaks are treated as top priority on our daily schedule.
24/7 Emergency Line
Our team is available around the clock for urgent leak situations.
Immediate Shutoff Guidance
We can walk you through shutting off your main water supply while help is on the way.
Rapid On-Site Detection
Technicians arrive equipped with detection tools to locate the source as quickly as possible.
Water Damage Mitigation Focus
We prioritize stopping the leak fast to limit further damage to your home.
Honest Emergency Communication
You’ll receive clear updates and explanations throughout the process, without added pressure.
Transparent Emergency Pricing
Upfront cost estimates are provided before any emergency repair work begins.
Experienced Under Pressure
Our technicians handle urgent situations calmly and efficiently, even during off-hours.
Coordination Support
We can point you toward trusted restoration contractors if water damage requires additional repair.
Post-Repair Follow-Up
We check back to confirm the repair is holding and no new issues have developed.
This approach ensures Hillsboro homeowners get fast, capable help exactly when a leak threatens to get worse.
Signs include a rising water bill, the sound of running water with fixtures off, damp spots, or a moving water meter even when nothing is in use.
Costs vary based on the leak’s location and severity, but we always provide a clear estimate before beginning any repair work.
Yes, we use acoustic and moisture detection tools to narrow down the leak’s location before opening only the smallest area necessary.
A slab leak occurs under your home’s foundation and should be addressed quickly, since it can lead to flooring damage and structural concerns if left unresolved.
Yes, water is typically shut off to the affected section during the repair, though we work to restore full service as quickly as possible.
Yes, aging copper pipes are prone to pinhole leaks caused by internal corrosion that isn’t visible from the outside.
Yes, we provide leak detection and repair services for both residential and commercial properties throughout the Hillsboro area.
Don’t let a hidden leak turn into a major repair. Call MT Dunn Plumbing to schedule a leak inspection and repair in Hillsboro, backed by precise detection and honest, lasting fixes.
Contact MT Dunn Plumbing today to book your appointment.
At M T Dunn Plumbing, our team is committed to delivering dependable plumbing solutions for residential and commercial properties throughout Sherwood and the surrounding communities.

As winter approaches, the cold can put significant strain on your plumbing system. A frozen pipe may seem like a minor problem at first, but

Clogged drains are one of those household problems that can quickly turn from a minor inconvenience into a major headache. Slow-draining sinks, backed-up showers, and

Most homeowners rarely think about their plumbing system until something goes wrong, a faucet starts dripping, a drain backs up, or the water heater suddenly
At M T Dunn Plumbing, we proudly serve Hillsboro, Beaverton, Portland, Tigard, Lake Oswego, Sherwood, Tualatin, West Linn, Wilsonville, Aloha, Newberg, Gaston, Banks, North Plains, and the surrounding Portland metro areas.
Call Today For A Free Case Evaluation