Electronic pressure testing and acoustic equipment — we find it, then we give you every option.
Maricopa County has some of the hardest water in the United States — typically 8 to 23 grains per gallon depending on the city. That mineral content attacks copper pipe from the inside out, thinning walls over years and eventually creating pinhole leaks below your foundation.
Caliche soil — the calcium carbonate layer that sits under most of the Phoenix metro — shifts as it dries out and rewets through the seasons. That movement stresses pipes that are already softened by mineral corrosion. Older homes with original copper plumbing are especially vulnerable.
If your home was built before 1990 and you've never had a slab issue, that doesn't mean you won't. It means the conditions have been building. Homes on the older copper common in that era, in hard-water cities like Scottsdale, Mesa, or Chandler, fail with regularity.
We shut off all fixtures and isolate the hot and cold supply lines separately. By pressurizing each line and watching what happens to the gauge, we confirm that a leak exists and identify which line — hot or cold — is losing pressure. This tells us exactly where to focus before any specialized equipment comes out.
Acoustic sensors are placed against the floor surface. Water escaping through a pinhole under pressure creates a distinct vibration signature as it interacts with the surrounding concrete. The equipment amplifies that signal and lets us distinguish a genuine leak from background noise, even through thick slabs.
Using readings from multiple sensor positions, we triangulate the source. We work methodically across the affected area — narrowing from a general zone down to a precise location, typically within a few inches. The spot is marked clearly before any further discussion happens. No guessing.
Once the leak is located and marked, we walk you through every repair path — direct access, rerouting, or epoxy lining. We explain the tradeoffs of each for your specific situation: pipe age, location, floor finish, and budget. You hear all of it before a single tile is touched.
We open the slab at the pinpointed location — and only at that location. The damaged section of pipe is cut out and replaced with new copper or PEX. The concrete is patched and refinished. Because we know exactly where the leak is before breaking anything, the opening is as small as possible.
A new supply line is run through the walls or ceiling, completely bypassing the leaking section, which is capped and abandoned in place. No jackhammer work — the slab stays intact. This is often the right move when the leak is in a hard-to-access location or when the pipe runs through a finished area that would be expensive to demolish and restore.
The interior of the existing copper pipe is coated with a structural epoxy liner. The process seals current leaks and creates a new pipe-within-a-pipe, protecting the entire run from future pinhole failures. This is a minimally invasive option that makes sense when the copper is old enough that additional leaks are likely — you treat the whole line rather than chasing failures one at a time.
Electronic pressure testing and acoustic pinpointing. The detection fee is credited toward the repair cost if you choose J&L to do the work — so if we fix it, you're not paying for detection twice.
Repair cost depends entirely on which method makes sense for your situation. Direct access runs $1,500–$4,000. Pipe rerouting runs $2,000–$5,000. Epoxy lining runs $3,000–$6,000+. We explain every option with honest tradeoffs before you decide.
It depends on the severity. A slow, small-volume leak under your slab may not require same-day emergency service, but it should not be ignored for weeks. Left untreated, a slab leak will saturate the soil beneath your foundation, which can lead to settlement, structural cracking, and mold growth if moisture migrates upward.
If you're hearing continuous running water with all fixtures off, seeing your meter spinning with everything closed, or noticing a significant warm area on your floor, call us as soon as you can. We'll tell you on the phone whether it sounds urgent.
Detection at J&L runs $350 to $700, depending on the size of the home, number of lines tested, and complexity of the job. That fee covers electronic pressure testing on both the hot and cold lines and acoustic pinpointing to locate the leak within a few inches.
If you choose us to perform the repair, the detection fee is credited toward the repair cost — you don't pay for it separately.
Not necessarily. There are three repair methods, and only one of them — direct access repair — involves opening the slab. The other two (pipe rerouting and epoxy lining) leave the slab completely intact.
Which method makes sense depends on your specific situation: where the leak is, how old the pipe is, and what type of flooring is above it. We go through all three options with you after detection, before any repair decision is made.
Coverage varies significantly by policy. Most standard homeowner's policies will cover the damage caused by a slab leak — flooring, drywall, belongings — but not the plumbing repair itself, which is typically considered a maintenance issue.
Some policies do cover the cost of opening and accessing the pipe (the "tear-out" cost) even if they don't cover the pipe repair. It's worth calling your agent before we start. We can provide documentation of the detection findings to support a claim.
Most slab leak detection visits take 1 to 3 hours. Pressure testing both lines is quick — usually under 30 minutes. The acoustic pinpointing phase takes longer depending on the size of the home and how much floor area needs to be scanned to isolate the signal.
After the leak is located, we walk you through your repair options on the same visit. You'll leave the conversation knowing exactly where the leak is, what your options are, and what each one costs.
Don't wait — water under your slab causes structural damage over time. We'll find it fast and walk you through every option.
Call (480) 720-7809 Mon–Fri 7am–6pm · Sat 8am–4pm