We find the leak you can’t see.
A hidden leak does quiet, expensive damage. We use detection tools to pinpoint exactly where it is, so the repair stays small.
Find it before it spreads
Hidden leaks are the ones that cost you.
The leaks that do the most damage are the ones you never see directly. Water finds its way behind a wall, under a slab, or between condo floors, and the first sign is often a higher water bill, a musty smell, a warm spot on the floor, or a stain that keeps coming back. By the time it’s visible, it’s usually been going for a while.
The mistake we see a lot is guessing, opening up a wall where the stain is and hoping that’s where the leak is. Water travels, so the stain is often far from the source. We use detection tools to pinpoint the actual leak before we open anything, which means a smaller repair and a lot less damage to your home.
Detection is the half of the job that saves you money. Once we know exactly where the leak is, the repair is straightforward and targeted. Because so many of our calls come from condos, we’re also used to the part where a leak in one unit shows up in another, and we know how to find which unit it’s actually coming from.
What’s included
What leak detection covers.
- Moisture identification. We locate where water is collecting and trace it back to the source.
- Pinpoint location. Detection tools that find the leak before we open a wall, slab, or ceiling.
- Acoustic and pressure testing. Listening equipment and pressure tests that narrow the leak to a small area.
- Pipe condition evaluation. We assess the surrounding pipe so you know whether it’s one spot or a failing line.
- Clear findings. We show you exactly what we found and explain the options in plain words.
- Condo leak tracing. Finding which unit a leak is actually coming from in a multi-unit building.
When to call us
You may have a hidden leak if:
- Your water bill jumped with no change in usage
- There’s a musty smell or visible mold
- A spot on the floor, wall, or ceiling is damp or warm
- Water pressure has dropped
- You hear water running when nothing’s on
- A stain keeps coming back after you paint over it
If you hear water moving when every fixture is off, that’s a strong sign of a leak somewhere in the system. Worth a call before it finds your drywall.
The way we work
We find it first. Then you decide.
Guessing where a leak is means tearing up more of your home than you need to. We pinpoint the source first, give you an honest price, and let you decide. No pressure.
Start my fix“Paul quickly identified my toilet was leaking from a failed wax seal which was not visible to me. He fixed it immediately. Thank you so much.”
Oahu specifics
Condo leaks are a different kind of detective work.
In a multi-unit building, water doesn’t respect unit boundaries. A leak two floors up shows up as a ceiling stain in your unit, and the building manager wants it found fast. This is some of the most common work we do, and finding the source means understanding how the building’s plumbing is stacked, not just where the water shows up.
For single-family homes, slab leaks and leaks inside walls are the ones homeowners dread, because the fear is tearing up the whole floor or wall to find them. With detection tools we narrow it down to a small area first, so the repair is targeted. Older Oahu homes with original copper or galvanized lines are the most common candidates for this kind of hidden leak.
Related work: Leak Repair · Repiping · Emergency Plumbing. Not sure which one you need? Tell us what’s happening and we’ll point you the right way, or call (808) 445-3585. You can also see recent jobs.
What working with us looks like
Straightforward, start to finish.
The first thing we do on any leak detection job is figure out what’s actually going on. We look at the real problem instead of guessing, and we explain what we find in plain language, no jargon, no scare tactics. You’ll know what’s wrong and what your options are before anything else happens.
Then you get a clear price. The number we quote is the number you pay, which is the whole reason John started Shoreline back in 2019 after watching another company do it the wrong way. A licensed plumber does the work, keeps you posted along the way, and cleans up the area before leaving. We finish by checking that everything runs the way it should.
None of that changes with the size of the job. A small leak detection call and a big one get the same honest diagnosis, the same clear price, and the same crew that takes pride in the work and leaves your place clean. We would rather do it right and earn the next call than rush it and lose your trust, because the reviews our customers leave are the only advertising we really count on.
That approach is why so many of our customers call us back and ask for our crew by name. If you’ve got a leak detection question or you’re ready to get on the schedule, reach out through our contact page or call (808) 445-3585. We answer, and we’ll give you a straight answer.
Why Oahu homeowners choose us
Honest, local, and licensed.
- The quote is the price. We hold the number we give you, with no surprise add-ons partway through.
- Licensed and accountable. Hawaii license #37423. If it’s not right, we make it right.
- A local Oahu crew. We know island homes, older condos, and the plumbing quirks that come with both.
- We show up when we say. On-time arrivals and clear communication so you’re not stuck waiting all day.
- Rated 4.9 across 377+ jobs. Real reviews from real Honolulu homeowners, on Google, Yelp, and Angi.
It’s a simple promise: tell you the truth, charge what we said, and do the work right the first time. That’s the standard John set when he founded Shoreline, and it’s the standard every plumber on the crew works to on every job, big or small, residential or commercial. More about how we work, or see recent jobs across Oahu.
Questions, answered straight
Frequently asked questions
How do you find a leak without tearing up my house?
We use detection tools, moisture readings, acoustic equipment, and pressure testing, to narrow the leak to a small area before we open anything. That keeps the damage minimal.
Why is my water bill suddenly high?
An unexplained jump in your water bill is one of the most reliable signs of a hidden leak. Water is escaping somewhere, and we can find where before it does visible damage.
The stain is in one spot, isn’t that where the leak is?
Not necessarily. Water travels along framing and pipes, so the stain is often far from the actual source. That’s exactly why we locate the leak before opening up anything.
Can you find a leak between condo units?
Yes, this is some of our most common work. We trace the leak to its actual source, which is often a different unit than where the water appears, and coordinate access as needed.
What happens after you find it?
We show you exactly where it is, explain whether it’s a simple repair or a sign of a bigger problem, and give you a clear price. The repair itself is our leak repair service.
Are you licensed?
Yes, Hawaii plumbing contractor license #37423. Detection is done properly and we stand behind the work.
Get on the schedule
Tell us about your leak detection
Send the details and we’ll reach out to set up a visit. Or call John’s crew now at (808) 445-3585, we answer.