
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 damaged waterline can cut off your home’s clean water supply, spike your water bill, or quietly erode the ground beneath your yard. MT Dunn Plumbing provides accurate, lasting waterline repair for Hillsboro homeowners, tracking down leaks, breaks, and corrosion in your main water service line before they turn into a bigger problem. From pinpoint leak repair to full line replacement, our technicians restore reliable water pressure and flow with minimal disruption to your property.
Our highly experienced plumbing professionals will contact you for a free estimate and consultation.








MT Dunn Plumbing has earned the trust of homeowners and businesses in Hillsboro by providing reliable plumbing services and quality workmanship. Customers appreciate the team’s prompt service, honest communication, and attention to detail. Whether it’s a routine repair or a major plumbing project, they are dedicated to delivering dependable results.
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
Water line issues are often hidden underground, which makes accurate diagnosis the most important part of the job.
Precision Leak Detection
Acoustic and pressure-based equipment locates leaks without random digging.
Experienced With Older Pipe
Skilled at repairing and replacing galvanized, copper, and polybutylene service lines.
Trenchless Repair Capability
Pipe bursting and lining methods available to avoid tearing up driveways and landscaping.
Licensed and Code-Compliant
All repairs meet Hillsboro plumbing code and local water utility standards.
Water Pressure Restoration
Repairs focused on getting your home back to full, consistent water pressure.
Transparent Cost Estimates
Written quotes provided before digging or repair work ever begins.
Utility Coordination
We handle locates and coordination with local utilities before any excavation starts.
Warrantied Repairs
Every waterline repair backed by a written workmanship warranty.
Property-First Approach
Careful excavation and full site restoration once the repair is complete.
Decades of Combined Experience
A team that has handled nearly every type of sewer failure imaginable.
Hillsboro homeowners trust MT Dunn Plumbing to find the real source of a water line problem and fix it correctly the first time.
Every repair follows a careful process designed to confirm the exact issue before any digging begins.
Technicians start by discussing low pressure, high water bills, wet spots, or discoloration to narrow down likely causes before inspection.
The main shutoff and meter are located and checked first, since meter readings often reveal whether a leak is active and how severe it is.
Specialized listening equipment is used along the suspected pipe path to pinpoint the exact sound signature of an underground leak.
Electronic locators trace the buried waterline’s exact path and depth, marking the ground above for precise, targeted access.
Technicians identify whether the line is copper, galvanized steel, polybutylene, or PEX, since material affects both the likely cause and the best repair method.
Based on pipe condition and damage type, we determine whether a spot repair, trenchless replacement, or full line replacement is the right long-term fix.
Before any ground is disturbed, technicians walk you through what was found and provide a firm cost estimate for the recommended repair.
Using the marked location, technicians open a minimal access point or, when trenchless, insert equipment through existing entry points.
Depending on the method, crews cut in a spot repair, burst and replace the old line, or excavate and install a new waterline section.
Once repairs are complete, the line is pressurized and tested to confirm a watertight seal and stable, consistent flow.
Water service is restored, pressure is verified at interior fixtures, and any disturbed ground is backfilled and restored.
Most spot repairs are completed within a few hours; full waterline replacements typically take one full day depending on line length and depth.
Waterline problems tend to get worse quietly before they become obvious. Call us if you notice:
Identifying the true cause is what allows us to recommend a repair that actually lasts.
From what we’ve seen, the answer is often yes. At MT Dunn Plumbing, we’ve seen how trenchless waterline replacement helps Hillsboro homeowners replace damaged water lines while preserving their landscaping, driveways, and outdoor spaces.
Replacing a damaged water line doesn’t always have to mean digging long trenches across your yard. Many homeowners assume excavation is the only solution, but modern trenchless technology can often install a new water line using only small access points. That means less disruption to your property, a faster project timeline, and fewer restoration costs after the work is complete.
We’ve worked with homeowners who were relieved to avoid tearing up mature landscaping, decorative walkways, and finished driveways. In many cases, trenchless replacement provided a dependable long-term solution without the inconvenience and expense of extensive excavation. However, we’ve also seen situations where collapsed pipes, unusual layouts, or challenging soil conditions made traditional excavation the better choice.
The cost of trenchless waterline replacement is often balanced by reduced restoration expenses and shorter project timelines. We view it as an investment that protects both your plumbing system and the appearance of your property while minimizing unnecessary disruption.
Older Hillsboro homes, especially those with aging underground water lines, mature trees, or established landscaping, often benefit the most from a trenchless evaluation. These properties frequently have conditions where minimizing excavation provides significant advantages without compromising the quality of the repair.
If you’re considering waterline replacement, don’t assume one method fits every situation. We’d rather evaluate your property honestly and recommend the solution that delivers the best long-term value for your home.
Every waterline problem is different, so we offer multiple repair methods to restore reliable water service for Hillsboro properties.
Waterline Repair Method
Spot Repair
Pipe Replacement
Trenchless Waterline Replacement
Traditional Excavation
Pipe Rerouting
Leak Detection and Repair
When We Recommend It
Small, isolated pipe leaks
Severely damaged or aging waterlines
Suitable underground waterline replacements
Collapsed or inaccessible waterlines
Waterlines beneath slabs or structures
Hidden waterline leaks
Primary Benefit
Repairs only the damaged section.
Provides a durable long-term solution.
Minimizes excavation and property disruption.
Allows complete access for major repairs.
Creates a new route around damaged piping.
Accurately locates and repairs leaks efficiently.
MT Dunn Plumbing recommends the most effective waterline repair method based on your pipe’s condition, property layout, and long-term plumbing needs in Hillsboro.
Fast Response • Upfront Pricing • Guaranteed Work
MT Dunn Plumbing provides precision leak detection, trenchless replacement, and full waterline repair services throughout Hillsboro, OR, backed by upfront pricing, warrantied workmanship, and fast emergency response when your water supply is on the line.
A major water line break can flood your yard or cut off your home’s water supply fast, and our team responds accordingly.
Immediate Response
Active waterline breaks are treated as top priority calls.
24/7 Emergency Service
Available around the clock, including nights, weekends, and holidays.
Fast Leak Location
Acoustic and electronic locating equipment deployed immediately on arrival.
Emergency Shutoff Support
Technicians act quickly to minimize water loss and property damage.
Same-Day Repair When Possible
Crews equipped to move from diagnosis into repair without unnecessary delay.
Upfront Emergency Pricing
Clear cost estimates provided before any emergency work begins.
Water Damage Coordination
Referrals and guidance provided if flooding has affected your home’s interior.
Follow-Up Verification
A return visit or check-in to confirm pressure and flow remain stable after the repair.
When a waterline emergency strikes, MT Dunn Plumbing moves quickly to restore your water supply and protect your property.
Costs depend on the type of damage and repair method needed; a single spot repair typically costs less than a full line replacement, and we provide a written estimate before starting any work.
Spot repairs are often completed within a few hours, while full line replacements typically take about one full day depending on length and depth.
Yes, in many cases trenchless methods replace the line through small access points at each end, leaving most of your yard undisturbed.
Signs include unexplained increases in your water bill, low water pressure, wet spots in the yard, or a spinning water meter when nothing in the house is using water.
Not always immediately, but galvanized pipe corrodes from the inside over time, so we recommend an inspection to assess remaining lifespan.
Yes, temporarily. We coordinate the shutoff window to be as short as possible and confirm restoration of full pressure before finishing the job.
Yes, MT Dunn Plumbing repairs both the main service line from the street to your home and interior supply piping throughout the house.
A hidden waterline leak only gets more costly the longer it goes unaddressed. Call MT Dunn Plumbing to schedule a waterline inspection or repair in Hillsboro and get your water pressure, your yard, and your peace of mind back where they belong.
Contact MT Dunn Plumbing today to book your waterline repair 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