Complete Leak Detection Services in the Princeton, NJ Area

A leak you can’t see is often worse than one you can.

The jobs our plumbers run look different from each other. An unexplained damp spot on a Summit basement floor is one. A New Providence water meter spinning with every fixture off is another. Mold on a Berkeley Heights wall with no visible water source is a third. Our plumbers narrow each of these down to a specific location in a specific pipe, then interpret what the readings actually mean before any wall or slab gets opened.

Years in Business

Skilled employees

Emergency Service

Trucks on the Road


After-Hours Detection When a Leak Can’t Wait Until Morning

A leak that’s actively spreading water through your home can’t wait for normal business hours.

Every hour an active leak runs, more drywall softens, more subfloor swells, and more insulation gets saturated. That’s why our response doesn’t wait for business hours. Our licensed plumbers serve Hamilton Township, Princeton, Hillsborough Township, and the surrounding communities, and after-hours trucks carry acoustic listening equipment and thermal imaging so the search can start the moment they arrive.

Sudden intrusion in a finished space, a slab that’s warming up, or a sound of water you can’t explain. All of them deserve a response that starts tonight.

4.7
Based on 6598 reviews
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(609) 799-3434

Our Process for Leak Detection Services

Leak detection is diagnostic work, and the value is in finding the actual leak, not just somewhere water happens to appear.

Every leak detection visit follows the same deliberate process, so the repair that follows addresses the right thing.

Our licensed plumber starts by understanding what you’re seeing, hearing, or noticing. Whether you’re in an older Maplewood home where slab leaks are common or a newer Monroe Township property where supply line issues may be the culprit, the symptoms often point to the type of leak and where to start looking.

Different leak types require different detection methods. We use acoustic listening devices for pressurized lines, thermal imaging for hot water leaks and slab leaks, moisture meters to verify affected areas, and video pipe inspection when appropriate. The equipment tells us where the leak is; our experience tells us what we’re looking at.

Once the leak is located, we walk you through what we found, explain the scope of the repair, and give you straightforward pricing. You’ll know exactly where the leak is and what it will take to fix before any repair work starts.

What Our Customers Are Saying

100% Satisfaction Guarantee

4.7
Based on 6598 reviews
Great service!!@!
Technician was most professional. He was on time and well-versed in HVAC maintenance.
Excellent job after quick response and scheduling
They are always available and in time and knowledgeable. Theyโ€™re the best!
Grateful Thomas was able to make it out to fix our AC today. He is professional and reliable. Many thanks!
Dayone B. explained why it is important to change the HVAC filter on a regular basis. Great service!
Jermaine was very helpful and took care of our sump pump issue right away. He knew what to do!
We had a problem with the AC with temperatures in the 90s – not fun! Stivin was able to quickly diagnose and fix a faulty high pressure switch. Much appreciated!
I had problems with our AC system and Ryan from Princeton Air did a fantastic job getting everything fixed. From start to finish he was professional, polite, and genuinely helpful. He took the time to explain everything clearly โ€” what the issue was, what he was doing to fix it, and how to avoid problems in the future โ€” which i really appreciated. Joe Leto was great as well, and the whole team made the entire process smooth and stress-free. Our AC is now working perfectly. Highly recommend Princeton Air for anyone with heating or cooling issues โ€” ask for Ryan!
Princetรถn fixed a problem with my whole house generator that my previous dealer could not fix. They are very professional and responsive.
Thank you for your hard work
Excellent service! Stiven R is a true professional. He provided excellent service and answered all my questions. I strongly recommend him to anyone needing services to their HVAC SYSTEMS.
Highly recommend this company. They were quick to help my grandma with a same day diagnostic. Martique was incredibly helpful, kind, and honest.
Update (July 2006) One of our AC units stopped working on a hot day in May. Ryan G. responded quickly and found the coolant was completely gone. He put a dye in the system to find the leak, and when he returned in June, he located it in the coil. He immediately contacted the manufacturer and dealer to order a replacement. Just two days later, Ryan back with the new coil and spent five hours replacing it and testing the system. Thanks to him, our AC has been running smoothly and we survived the 100+ degree heatwaves over the 4th of July! We are so grateful for Ryan's prompt, diligent work, and the office staff was equally courteous and efficient. Highly recommend!
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Mr. Gordon has done the maintenance of our furnace for the past three years. He is very professional, diligent, and patient. He takes time to check various things to make sure everything is working fine and the installation were done correctly. We are very happy.
Latrell the technician was very knowledgeable and answered all my questions
Technician was professional, knowledgeable and courteous.
Wilver completed the job quickly and cleaned up the bathroom area.
Always a great and quality experience. Todayโ€™s technician was especially great.
Dominic was great service was great.
Prompt service and communication by phone and text regarding arrival and appointment. Quick diagnostic and repair by knowledgeable technician very satisfied.
The guy they sent over was very nice very professional.
The service and knowledge was amazing. Very professional. Fatmir was a pleasure to work with. I appreciate his considerable knowledge with the work completed today. I would be pleased to have him back if other issues occur.
Great service, very responsive
Great service and follow up. Honest answers
As a former Weltman customer , I found the transition to this company to be easy. They are responsive , supportive and honest regarding timing for an urgent AC repair.
Cruz (or Cruise? we talked alot, I would hate to misspell his name!) the first Princeton Air Tech that I met was prompt , polite, informative AND able to diagnose and fix the problem with my outside unit quickly . He also took the time to educate me regarding preventive maintenance of the units .

Types of Leaks We Detect

Leaks take many forms, and knowing what type of leak you’re dealing with changes both the detection method and the repair.

Princeton Air’s licensed plumbers locate every category of residential water leak across Mercer County, Middlesex County, and Somerset County, including the ones that don’t show up as visible water.

Pressurized water lines running through walls can develop leaks at joints, connections, or along pipe runs. These leaks often show up as damp drywall, warped flooring, or staining on ceilings below. Acoustic listening equipment locates the exact failure point without opening the wall.

Water lines running through or under a concrete slab can develop leaks that warm the floor, raise water bills, and eventually surface through the slab itself. Thermal imaging and acoustic detection locate slab leaks precisely, so the repair minimizes the slab work required.

The main water line from the street to your home can develop leaks underground, showing up as soft ground, unusually lush grass in specific spots, or unexplained water bill increases. Pressure testing and acoustic detection locate the leak without digging up the entire line.

Unlike supply line leaks, sewer line failures involve wastewater escaping from a non-pressurized line. Video pipe inspection locates cracks, offsets, and breaks in sewer laterals, giving you a clear picture of what needs to be repaired.

Some leaks originate at fixtures, water heaters, or appliances and then travel through walls and floors before showing up. Our plumbers trace water back to its actual source so the repair addresses the leak, not just where the water ends up.

(609) 799-3434

Why Professional Leak Detection Matters

Finding a leak yourself is sometimes possible, but finding it precisely, early, and without destroying your home in the process takes professional equipment and experience.

Across older homes in Trenton, Montclair, and South Orange, hidden leaks often run for months before visible damage appears. The reasons professional leak detection is worth the investment are grounded in what happens when leaks are mislocated or found too late.

The wrong leak location leads to the wrong wall being opened, the wrong floor being cut, or the wrong section of yard being dug up. Professional detection locates the leak precisely, so the repair affects only what actually needs repair.

A small leak inside a wall can run for weeks before visible damage appears, by which point mold, structural damage, and rotted framing may be involved. Early detection limits the damage to the leak itself rather than everything it’s affected.

When your water bill jumps without an obvious reason, a hidden leak is usually the cause. Leak detection identifies the source and quantifies the impact, so you stop paying for water that’s damaging your home.

Water finds the path of least resistance, which usually means traveling along joists, through subfloors, and down through ceilings. Precise leak detection stops the damage before it spreads to the structural elements of your home.

Insurance carriers typically require documented professional leak detection before approving water damage claims. Our service provides the documentation you need, and we can work with your insurance process when applicable.


Princeton Air Technician

(609) 799-3434

Signs You Need Leak Detection

Most homeowners who call us already know something isn’t right. The question is what it is and where.

If you’re seeing any of these signs in your home in Westfield, Summit, Warren, or the surrounding area, professional leak detection is usually the right next step.

An unexplained jump in water usage, especially one that keeps climbing month over month, almost always means a hidden leak. If you haven’t changed your water use patterns, something is using water you can’t see.

The sound of water running through pipes when every fixture is off points to a leak somewhere in the system. This is one of the clearest indicators that professional detection is worth scheduling right away.

A warm spot on a concrete slab or a wall that feels unusually warm to the touch often indicates a hot water line leaking behind or below the surface. Thermal imaging confirms and locates these leaks precisely.

Damp drywall, mold growth in unexpected places, or persistent musty smells in an area of your home usually point to a hidden leak feeding moisture into the space. The sooner it’s located, the less damage spreads.

A main water line leaking underground can create damp ground, sinkholes, or patches of grass that are noticeably greener than the surrounding lawn. These signs warrant professional detection before the line fails completely.


Other Plumbing Services

Leak detection is the diagnostic step, and the repair that follows often involves related plumbing work.

Once the leak is located, the repair that follows stays with the same licensed team that found it, whether the fix is a simple pipe repair or part of a larger plumbing project.

Once the leak is located, our licensed plumbers handle the repair with the precision your home’s plumbing system requires. The diagnostic work and the repair are often completed in the same visit when the situation allows.

When leak detection reveals that one section of your plumbing is failing or an entire material has reached end of life, targeted pipe retrofitting or whole-home repiping is often the right long-term solution.

Main water line leaks require specialized repair, often involving trenchless replacement or targeted excavation. Our plumbers handle main line work as a companion service to the detection.

When sewer line inspection reveals damage that can be addressed without excavation, trenchless pipe lining restores the line from the inside out. We handle trenchless work as part of an integrated sewer solution.

When a leak requires urgent response, our 24/7 emergency service dispatches licensed plumbers with detection and repair equipment, so the situation gets contained and addressed in a single visit.

(609) 799-3434


(609) 799-3434

Why Homeowners Trust Princeton Air for Leak Detection

An active leak gets worse every hour it runs, which is why our after-hours response is available seven days a week. Call anytime and you’ll reach a licensed plumber ready to start the search.

Leak detection is interpretive work. The equipment tells you where to look, but experience tells you what you’re looking at. Our licensed plumbers handle leak detection regularly, and that regular practice shows up in the accuracy of every diagnosis.

We bring the acoustic listening devices, thermal imaging cameras, moisture meters, and video inspection equipment that professional leak detection requires. Every tool is matched to the type of leak we’re diagnosing.

Leak detection is interpretive work. The right call comes from seeing enough homes, enough pipe materials, and enough failure patterns to know what the equipment readings actually mean. Princeton Air has spent more than 50 years building that knowledge.

Once we find the leak, we tell you exactly what the repair involves and what it will cost. You won’t be sold a larger scope than the situation requires.

Leak detection only works if the location we give you is actually correct. Every job is backed by our full satisfaction guarantee, and if the location turns out to be wrong, we come back at no additional charge.


Schedule Leak Detection Service With Princeton Air Today

A hidden leak doesn’t get better on its own, and the longer it goes undetected, the more damage it causes to the home around it.

The symptoms are usually unmistakable: an unexplained bill jump, a warm spot, the sound of water running when nothing’s on.

What’s harder is locating the leak precisely, without tearing the place apart to find it. That’s what our licensed plumbers do, with acoustic listening, thermal imaging, and video inspection.

Contact Princeton Air today to schedule leak detection service in New Jersey.

Princeton Air Technician


Leak Detection FAQs

How do you find a leak without tearing up my house?

Professional leak detection uses equipment that locates leaks non-invasively: acoustic listening devices that hear the specific sound water makes when escaping a pressurized pipe, thermal imaging cameras that detect temperature differences from hot water leaks, moisture meters that map the extent of affected materials, and video pipe inspection for sewer lines. The goal is to narrow the leak location to within inches, so the repair affects only what has to be opened.

How long does leak detection take?

Most residential leak detection visits take between one and three hours, depending on the type of leak and how accessible the affected area is. Slab leaks and outdoor main line leaks often take longer than leaks in accessible walls. Our plumbers give you a realistic timeline when we arrive.

Can you detect a leak if I don’t know where it’s coming from?

Yes. That’s exactly what professional leak detection is for. Most homeowners who call us know something is wrong but can’t pinpoint the source. Our job is to start with the symptoms and use the right equipment to locate the leak precisely.

Will insurance cover leak detection and repair?

Most homeowner’s insurance policies cover sudden, accidental water damage, which often includes the detection and repair work required to address the leak. Coverage for gradual leaks and long-term damage varies by policy. We can provide documentation for your insurance claim, but coverage decisions are up to your carrier.

Do you offer emergency leak detection service?

Yes. When a leak requires immediate response, Princeton Air provides 24/7 emergency service throughout the area. Our licensed plumbers arrive with detection equipment and the ability to perform most repairs on the spot.

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