Plumbing Leak Detection & Repair in Gurnee, IL
A hidden plumbing leak can waste thousands of gallons of water and cause costly damage before it becomes visible. If you suspect a leak, acting quickly can help protect your home or business from structural damage, mold growth, and expensive repairs. C.A.B. Backflow provides professional plumbing leak detection in Gurnee, IL, using proven diagnostic methods to locate leaks accurately and recommend the right repair.
For more than 30 years, our licensed, bonded, and Illinois EPA certified plumbers have helped homeowners and commercial property owners identify and repair hidden plumbing leaks. Whether the problem is behind a wall, beneath a concrete slab, inside a ceiling, or within your underground plumbing, our team works to locate the source efficiently while minimizing unnecessary disruption.
WARNING SIGNS
Signs You May Have a Hidden Plumbing Leak
Not every plumbing leak is easy to spot. Many develop behind finished walls, beneath flooring, or underground where they can go unnoticed for weeks or even months. Knowing the warning signs can help you schedule service before the damage becomes more extensive.
Some of the most common indicators include:
- Unexpected increases in your water bill. A sudden rise in water usage without changes in household habits may indicate a hidden leak.
- The sound of running water when everything is turned off. If you hear water moving through your plumbing after all fixtures have been shut off, a concealed leak could be present.
- A spinning water meter dial. If your water meter continues moving after all faucets, appliances, and irrigation systems are turned off, water may be escaping somewhere in the plumbing system.
- Damp, stained, or discolored walls, ceilings, or floors. Moisture marks often signal water leaking behind finished surfaces.
- Warm spots on flooring. Hot water line leaks beneath a slab can create unusual warm areas on tile, hardwood, or concrete floors.

OUR PROCESS
How Professional Leak Detection Works
Finding a hidden leak requires more than guesswork. C.A.B. Backflow follows a structured process to accurately locate the problem and recommend the appropriate repair.
01
Initial Evaluation
We begin by discussing the symptoms you have noticed, reviewing your plumbing history, and performing a visual inspection of the affected areas.
02
Leak Detection and Testing
Our plumbers use professional diagnostic methods to narrow down the location of the leak. Depending on the situation, this may include pressure testing, visual inspection, moisture evaluation, or specialized plumbing equipment.
03
Confirm the Source
Once the leak has been identified, we explain what caused the problem, where it is located, and how it has affected your plumbing system.
04
Repair Recommendations
Before any repairs begin, we provide clear options along with straightforward explanations and pricing. If multiple repair methods are available, we discuss the advantages of each so you can make an informed decision.
Common Places Leaks Are Found
Plumbing leaks can occur almost anywhere water travels throughout your property. Some locations are more prone to problems because of age, corrosion, shifting foundations, or everyday wear.
Our plumbers commonly locate leaks in:
- Water supply lines
- Drain and waste pipes
- Hot water lines
- Slab plumbing beneath foundations
- Kitchen plumbing
- Bathroom plumbing
- Laundry room plumbing
- Basement plumbing
- Ceiling piping
- Underground water service lines
- Outdoor hose bibs and irrigation connections
After detection
What Happens After the Leak Is Found
Once the leak has been located, our team explains the condition of the affected plumbing and recommends the most appropriate solution.
Depending on the situation, repairs may involve replacing a damaged section of pipe, repairing a plumbing connection, updating worn fittings, or recommending partial repiping if multiple areas show signs of deterioration.
WHY CHOOSE US
Why Choose C.A.B. Backflow & Plumbing for Leak Detection
Choosing an experienced plumbing company helps ensure hidden leaks are located accurately and repaired properly.
Homeowners and businesses throughout Gurnee choose C.A.B. Backflow because we provide:
- More than 30 years of plumbing experience
- Licensed and bonded professionals
- Illinois EPA certification
- Residential and commercial plumbing services
- Thorough diagnostics before recommending repairs
- Honest communication and transparent pricing
- Modern equipment for accurate inspections
- Repairs completed according to Illinois plumbing codes

Leak Repair Services
Once a leak has been located, we perform dependable plumbing repairs using quality materials and proven repair methods. From small pipe leaks to damaged water lines, we work to restore your plumbing system efficiently.
Sewer & Plumbing Camera Inspection
Camera inspections allow us to view the inside of drain and sewer lines to identify cracks, blockages, root intrusion, and other hidden plumbing issues without unnecessary excavation.
Plumbing Repipe
If multiple leaks are caused by aging or deteriorating pipes, repiping may provide a more reliable long-term solution than repeated repairs. Our plumbers evaluate your plumbing system and explain whether partial or complete repiping is appropriate.
Customer feedback
See What Our Customers Say
For more than 30 years, C.A.B. Backflow has provided dependable plumbing services for homeowners and businesses throughout Gurnee.
Customers frequently recognize our team for:
- Accurate leak diagnosis
- Professional communication
- Prompt service
- Thorough inspections
- Quality workmanship
- Fair and transparent pricing
- Respectful service
Book Your Appointment Today
A hidden plumbing leak rarely improves on its own. Early detection can help reduce water damage, prevent mold growth, and avoid more extensive plumbing repairs. If you suspect a hidden leak, C.A.B. Backflow is ready to help with professional plumbing leak detection in Gurnee, IL and dependable repair services.
Contact our experienced plumbing team today to schedule an inspection and protect your home or business from further damage.
What can we do for you?
How do I know if I have a hidden water leak?
Common warning signs include higher water bills, damp spots on walls or floors, musty odors, reduced water pressure, the sound of running water when fixtures are off, or a water meter that continues moving when no water is being used.
Is leak detection covered by homeowners insurance?
Insurance coverage varies by policy and the cause of the leak. While some policies may cover damage caused by a sudden plumbing leak, they may not cover the cost of locating or repairing the leak itself.
How much does professional leak detection cost in Gurnee, IL?
The cost depends on factors such as the location of the suspected leak, the complexity of the plumbing system, and the diagnostic methods required.
Will you need to cut into my walls or floors to find the leak?
In many cases, professional leak detection allows us to narrow down the location of the problem before any access is needed. If opening a wall or floor becomes necessary to complete the repair, we explain the reasons before proceeding.
How fast can a plumber respond to a suspected leak?
Response times depend on scheduling, the severity of the situation, and current service demand. If the leak is causing active water damage or poses an immediate concern, we work to respond as quickly as possible.
