Full pressure test
We isolate your plumbing system, pressurize it, and watch the gauge. If it drops, we know you have a leak and roughly where it is. This test covers supply lines, drain lines, and the sewer lateral.
Licensed
Licensed & Bonded
Fully Insured
Insured & Bonded
24/7 Emergency
Same-Day Response
Warranty Backed
10+ Years Trusted in Covina
What our leak detection service includes
Every leak detection call includes a full system pressure test, electronic and acoustic scanning, and a written summary of what we found. If you hire us for the repair, the detection fee is credited toward the work. Here's what's covered.
Electronic leak detection
We use acoustic listening equipment and electronic sensors to pinpoint the leak within about 6 inches. This works for slab leaks, underground leaks, and leaks inside walls. No exploratory demolition needed.
Pipe camera inspection
For sewer and drain leaks, we run a pipe camera inspection to see the inside of the line. We can spot root intrusion, cracked pipe, and corrosion that a pressure test alone won't show.
Written findings and repair quote
You get a written summary of the leak location, the cause, and the repair options with pricing. We photograph the location so you can see exactly what we found. No pressure to book the repair on the spot.
Repair and retest
If you approve the repair, we fix the line using copper pipe, PEX tubing, or SharkBite fittings. We retest at full pressure before we leave and clean up the work area. Most repairs are done in one visit.
Leak Detection Covina CA done right the first time
Leak detection Covina CA is the process of finding exactly where water is escaping from your plumbing system before it causes structural damage. We pressurize the line, listen for the leak with acoustic equipment, and confirm the location with a pipe camera inspection. That means we know whether the problem is a pinhole in a copper pipe, a failed fitting behind the drywall, or a slab leak under the foundation. No guesswork, no exploratory demolition, no surprise repair bills.
Covina has a lot of homes built between the 1950s and 1980s with original copper and galvanized pipe. Hard water buildup eats those lines from the inside, and root intrusion from mature sycamores and ficus trees pushes into sewer laterals and water mains. If you're searching for water leak detection in Covina because your water bill doubled or you hear water running when nothing is on, we can pinpoint the source the same day you call.
How our leak detection process works
We follow the same five-step sequence on every call, whether it's a 2 a.m. burst pipe or a slow slab leak you've been watching for weeks.
01
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
02
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
03
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
04
Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Tools and methods we use for leak detection
Tools & Equipment
Electronic leak detection equipment
Picks up the sound of water escaping under concrete or behind walls. Lets us pinpoint a slab leak within 6 inches without breaking the floor.
Pipe camera inspection
A flexible camera that goes inside sewer and drain lines. We use it to spot root intrusion, cracked pipe, and corrosion that a pressure test can't show.
Acoustic listening gear
Amplifies the sound of leaking water so we can trace it along a pipe run. Works well for underground leaks and leaks inside walls.
Press tool and soldering torch
For repairs. We use a press tool for PEX and copper fittings, or a soldering torch for traditional copper joints. Both meet Uniform Plumbing Code (UPC) standards.
PEX crimping tool
For securing PEX tubing connections during repiping and leak repairs. PEX is flexible and resists hard water corrosion better than copper in Covina's water.
Hydro jetting machine
Clears grease, scale, and roots from sewer lines after we find a blockage. We use it when the leak is caused by a backed-up line rather than a broken pipe.
Drain snake and sewer auger
For smaller clogs and drain cleaning. We run a camera after snaking to confirm the line is clear and there's no hidden damage.
Methods & Standards
Pressure testing
We isolate the plumbing system, pressurize it with a gauge, and watch for a drop. This tells us whether the leak is on the supply side, drain side, or sewer lateral. It's the first step on every leak detection call.
Acoustic leak location
We use listening equipment to trace the sound of escaping water along the pipe run. This works for slab leaks, underground leaks, and leaks inside walls. We mark the location on the floor with tape before any repair.
Pipe camera inspection
We feed a camera into the sewer or drain line to see the inside of the pipe. This shows us root intrusion, cracks, and corrosion. We use it on every sewer-related leak call.
Thermal detection
For hot water slab leaks, we use thermal sensors to find the warm spot under the floor. That confirms the leak location without cutting concrete. We combine it with acoustic detection for a second confirmation.
Code-compliant repair
All repairs meet Uniform Plumbing Code (UPC) and IAPMO certification standards. We use copper pipe, PEX tubing, or SharkBite fittings depending on your system. We retest at full pressure before we leave.
When to call for leak detection in Covina
01
You got a letter from the city about high water usage at your Covina home.
What we do: We pressure-test the system and run electronic leak detection to find the source. Most city letters mean a slab leak or an underground irrigation leak. We pinpoint it and give you a repair quote the same day.
→ You get a clear answer and a repair plan before the next billing cycle. No more guessing why the meter is spinning.
02
You're buying a home in Covina and the inspection report mentions possible plumbing issues.
What we do: We run a full leak detection inspection, including a pipe camera inspection on the sewer lateral. We check for slab leaks, corroded copper pipe, and root intrusion. You get a written report you can use in negotiations.
→ You know exactly what you're buying and what repairs will cost. No surprises after closing.
03
Your water heater is leaking and you're not sure if it's the tank or a nearby pipe.
What we do: We isolate the water heater, pressure-test the lines, and check the tank fittings. If the leak is in the plumbing, we repair it. If the tank is failing, we quote a replacement from Rheem, Bradford White, or AO Smith.
→ You get the right fix the first time, whether it's a $200 repair or a new water heater.
04
You hear water running at night but every fixture is off.
What we do: That's a classic hidden leak symptom. We run acoustic detection and a pressure test to find it. It could be a running toilet, a slab leak, or an underground line. We find it in 2 to 4 hours.
→ The sound stops, your bill drops, and you avoid water damage to your floors and framing.
How leak detection works in Covina specifically
Covina sits in the San Gabriel Valley, and our soil shifts with the wet and dry seasons. That movement stresses underground pipes and causes slab leaks in older homes. Most of the housing stock here was built between 1950 and 1985, which means original copper pipe and galvanized steel are still in service. Hard water buildup corrodes those lines from the inside, and mature trees send roots into sewer laterals. We also see a lot of water heater leaks in homes with original plumbing. If you're searching for water leak detection in Covina, California, we know exactly where to look. We serve the 91722, 91723, and 91724 ZIP codes and the surrounding Los Angeles County area.
Neighborhoods We Serve
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Downtown Covina
Older commercial and residential buildings with original copper pipe. We see slab leaks and corroded fittings in the historic homes near Citrus Avenue.
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Charter Oak
Many 1960s ranch homes with galvanized steel pipe that's past its service life. Leak detection here often leads to whole-home repiping with PEX tubing.
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West Covina
Larger lots with mature trees. Root intrusion in sewer laterals is common, and we run pipe camera inspection on most calls.
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Glendora
Higher elevation means more water pressure, which stresses older pipes. We see pinhole leaks in copper pipe and burst pipe failures.
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San Dimas
Mix of older homes and newer construction. We handle both slab leaks in older slabs and underground leaks in irrigation lines.
Local Conditions We Plan For
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Hard water with high mineral content
Calcium and magnesium build up inside copper pipe and cause pinhole leaks. We often recommend a water softener after repairing a leak to prevent the next one.
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Seasonal soil movement
Covina's clay soil expands when wet and shrinks when dry. That movement cracks underground pipes and stresses slab plumbing. Most slab leaks we find happen after a wet winter or a dry summer.
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Mature trees near sewer lines
Ficus, sycamore, and oak roots seek water and crack sewer laterals. We run a pipe camera inspection on every sewer leak call to check for root intrusion.
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Aging copper and galvanized pipe
Homes built before 1985 often have original pipe that's corroded. Leak detection frequently turns into a repiping recommendation when we find multiple weak spots.
Slab leak under a Downtown Covina hallway
Leak problems we solve for Covina homeowners
Hidden water leaks don't fix themselves. Here are the most common problems we see in Covina and what happens if you ignore them.
Problem
Water bill suddenly doubles with no visible leak
A hidden leak can waste 10,000 gallons a month and add $100 to $200 to your bill. If it's under the slab, it can also erode the soil and crack your foundation.
Our Fix
We run a full pressure test and electronic scan to find the leak within 6 inches. Once we pinpoint it, we repair the line and retest. Most customers see their bill return to normal within one billing cycle.
Problem
Warm spot on the floor or sound of running water
A warm spot usually means a hot water slab leak. The water is heating the concrete from below, and the constant moisture can warp hardwood floors and cause mold within weeks.
Our Fix
We use acoustic and thermal detection to confirm the leak location, then repair or reroute the line. Slab leak detection Covina CA jobs are usually done in 2 to 3 hours with one small access hole.
Problem
Low water pressure throughout the house
Low pressure often means a corroded pipe or a leak that's bleeding pressure before the water reaches your fixtures. Ignoring it leads to burst pipe failures and emergency calls.
Our Fix
We pressure-test the system, check for hard water buildup, and inspect the main line. If the pipe is too far gone, we recommend whole-home repiping with PEX tubing or copper pipe. We'll show you the test results before recommending anything.
Problem
Sewer smell or backup in the yard
Root intrusion and cracked cast iron pipe let sewage escape underground. That's a health hazard and can contaminate your soil. It also gets worse every month you wait.
Our Fix
We run a pipe camera inspection to find the break, then repair or replace the line. For severe root intrusion, we may recommend trenchless sewer repair to avoid digging up your yard. We serve all of Covina and Los Angeles County.
Why Covina homeowners call us for leak detection
A hidden leak can waste 10,000 gallons a month and rot your framing before you see a drop. Here's what you get when you call us.
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Stop water damage early
A slab leak the size of a pencil tip can dump 8,000 gallons a month under your foundation. We find it in 2 to 4 hours, so you can repair the line before it undermines the slab or warps your hardwood floors. Early detection saves Covina homeowners thousands in structural repair.
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No unnecessary demolition
Our electronic leak detection for Covina CA homes pinpoints the leak within 6 inches, so we cut one small access hole instead of tearing up an entire hallway. You keep your flooring, your tile, and your weekend. We mark the spot with tape before any repair work begins.
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Lower water bills fast
Covina water rates climbed again in 2026, and a hidden leak can add $80 to $200 a month to your bill. Once we locate and repair the line, your meter stops spinning and your next statement drops back to normal. Most customers see the difference in one billing cycle.
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Protect your foundation
Water under a slab causes soil erosion, cracks in drywall, and doors that stick. Underground leak detection Covina service catches the problem while the repair is still a pipe fix, not a foundation job. We also check for gas leak and sewer line backup issues while we're on site.
Licensed, certified, and reviewed
Licensed & Certified
- California Contractor License (C-36 Plumbing) — issued by California State License Board
- EPA Lead-Safe Certified — issued by U.S. Environmental Protection Agency
- Backflow Prevention Certification — issued by Los Angeles County Department of Public Health
- OSHA Safety Compliance — issued by Occupational Safety and Health Administration
- IAPMO Certification — issued by International Association of Plumbing and Mechanical Officials
Verified Reviews
Google ★★★★★4.9
A1 found a slab leak that two other plumbers missed. They used electronic equipment and marked the exact spot on the floor. Repair was done the next day and the price was exactly what they quoted. Highly recommend for leak detection in Covina.
Yelp ★★★★★4.8
Called at 7 a.m. about water running under the house. A1 had a tech out by 10 a.m. He found a cracked pipe in the crawlspace and fixed it the same visit. Fair price, no upsell, and he cleaned up after himself.
BBB A+
We use A1 for all our rental properties in Covina. They've found underground leaks, slab leaks, and sewer line breaks. Always on time, always honest about what needs fixing. Ten years in business and it shows.
10 years of leak detection experience in Covina
A1 Plumbing Covina CA has been finding and fixing leaks in Covina since 2016. Our technicians hold California Contractor License (C-36 Plumbing) credentials and train on the same leak detection equipment used by municipal water departments. We've worked on slab leaks in 1950s ranch homes, underground leaks in Charter Oak, and sewer line backups caused by root intrusion in Downtown Covina. We know how Covina homes are built and where they fail.
- State-licensed plumbing contractor with C-36 certification and OSHA safety compliance training.
- EPA Lead-Safe Certified for work in pre-1978 Covina homes with original galvanized pipe.
- Trained on pipe camera inspection, acoustic listening, and electronic leak detection equipment.
- Experienced with copper pipe, PEX tubing, PVC pipe, ABS pipe, and cast iron pipe systems.
- Backflow Prevention Certification for Covina properties with irrigation and pool systems.
What Covina customers say about our leak detection
Real experiences from customers who chose our Leak Detection services.
“Our water bill went from $90 to $240 in one month. A1 came out the same day, ran their equipment, and found a slab leak under the hallway in about two hours. They marked the spot, gave us a repair price, and fixed it the next morning. No guesswork, no mess. I've already recommended them to two neighbors.”
M
Maria R.
Homeowner, Downtown Covina
“I heard water running at night but couldn't find anything. A1 used a pipe camera and acoustic gear to trace it to a pinhole leak in the copper pipe behind the bathroom wall. They cut one small hole, fixed it, and patched it back. Total job was under four hours. Fair price and they cleaned up after themselves.”
J
James T.
Homeowner, Charter Oak
“We manage six rental units in Covina and use A1 for all our leak calls. They found an underground leak in the front yard that two other companies missed. Their electronic detection pinpointed it within a foot. Tenants were without water for less than a day. That's the kind of service we need.”
L
Linda M.
Property Manager, West Covina
Frequently Asked Questions
Real answers to the questions we hear most often from local homeowners and property managers.
How much does leak detection cost in Covina CA?
Most leak detection jobs in Covina run $180 to $450 depending on how deep the leak is and how much access we need. Slab leaks and underground leaks cost more because they take longer to pinpoint. We give you the exact price before we start, and the detection fee is credited toward the repair if you hire us for the fix.
How do I know if I have a hidden water leak in Covina?
The three biggest signs are a water bill that jumped 20% or more, the sound of running water when every fixture is off, and a warm spot on the floor. Check your meter: if the dial spins with nothing running, you have a leak. We can confirm it with water leak detection in Covina, California the same day you call.
Can you detect a slab leak without breaking the floor in Covina, California?
Yes. We use electronic leak detection and acoustic equipment to pinpoint slab leaks within about 6 inches, so we only cut one small access hole for the repair. You don't need to tear up the whole floor. Most slab leak detection Covina CA jobs are done in 2 to 3 hours with minimal disruption.
Do you offer emergency leak detection near me in Covina CA?
We run 24/7 emergency dispatch for burst pipes, water heater leaks, and active slab leaks. Call 626 687 0334 any time and we'll get a technician headed your way. For after-hours calls, we prioritize leaks that are actively flooding or threatening the foundation.
Related Services
Emergency Plumber
When a pipe bursts at 2 a.m., our emergency plumbers in Covina respond 24/7. We shut off the water, stop the leak, and repair the line before it floods your home. Same crew that handles leak detection Covina CA calls.
View Emergency PlumberDrain Cleaning
A slow drain can signal a clogged drain or root intrusion in the sewer lateral. We clear the line with a drain snake or hydro jetting machine, then run a pipe camera inspection to confirm it's clean. Available across Covina and Los Angeles County.
View Drain CleaningSewer Line Repair
Root intrusion and corroded cast iron pipe cause sewer line backup and water leaks underground. We locate the break, repair or replace the section, and test the line before we leave. Serving Covina, West Covina, and Glendora.
View Sewer Line RepairTrenchless Sewer Repair
We replace damaged sewer lines without digging up your yard or driveway. Trenchless repair uses a pipe camera inspection to map the line, then pulls a new liner or pipe through the old one. Faster recovery, less mess in Covina.
View Trenchless Sewer RepairHydro Jetting
High-pressure hydro jetting clears grease, scale, and roots from sewer and drain lines. We use it after leak detection Covina CA service when the problem is a blocked line rather than a broken pipe. Safe for PVC pipe, ABS pipe, and cast iron pipe.
View Hydro JettingSlab Leak Repair
Once we pinpoint a slab leak, we repair or reroute the line. Most repairs take one day and involve a small access hole. We use copper pipe or PEX tubing depending on your system. Available in Covina, Charter Oak, and San Dimas.
View Slab Leak RepairCall A1 Plumbing Covina
Reach us at 626 687 0334 any hour of the day. Our office answers from 7 a.m. to 7 p.m. on weekdays, and emergency dispatch runs 24/7 for leaks, backups, and gas calls. Tell us what is happening and we will give you a straight answer and a flat price before anyone heads your way.
A1 Plumbing Covina CA
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Phone
626 687 0334 -
Address
4715 N Vecino Dr, Covina, CA 91722
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Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available