A water bill that doubled with nothing in the house changed. A damp spot at the base of a wall that keeps coming back after you dry it. Water leak detection is what Riley Plumbing, Heating, and Air gets called for when something is clearly wrong and nothing is visibly broken, and we have been running those calls across the Carson Valley, Reno, and the Tahoe basin for more than twenty years. The leak is almost never where the damage shows up. Here is how we narrow it down before anyone opens a wall, and what it usually turns out to be.
Where Hidden Leaks Actually Happen Around Here
Most of our housing stock sits over a crawlspace, not a slab, and that changes everything about how a leak behaves. Your supply lines run under the floor through an unconditioned space that swings from below freezing in January to hot and dry in July. Copper in that environment moves. It expands when hot water runs through it, contracts when it cools, and over thirty years it works itself thin wherever it rubs a joist, a strap, or a drilled hole that was cut a little tight.
Then there is the water itself. Ours carries a heavy mineral load, and scale plus dissolved oxygen will put pinholes in copper from the inside while abrasion works on it from the outside.
The other common one is simple physical damage. We took a call this fall where a copper line in the crawlspace had been knocked loose and started running. The homeowner had already shut the water off at the main, which was the right move and saved her a floor. We have also chased a leak behind a wall in a multi-unit building in South Lake Tahoe, where the water was traveling through framing and showing up two rooms away from the break.
The Signs That Bring Homeowners to Us
- The leak indicator on your water meter turning when every fixture in the house is off
- A bill that jumped with no change in how you use water
- Damp carpet edges, swelling baseboard, or a musty smell with no visible source
- Water pressure that dropped and never came back
- A warm patch on the floor, which usually means the hot-water line
- The water heater cycling more than it used to
One of those by itself may be nothing. Two together and you should call.
Water Leak Detection Starts With Isolation, Not Equipment
Here is where money gets wasted in this trade. The temptation is to show up with gear and start listening. We do the simple tests first, because they tell us what we are even looking for.
We shut the water off at the meter and watch the leak indicator. We close the cold inlet valve at the water heater and watch it again, which separates the hot side from the cold side in about two minutes. We put a gauge on a hose bib, isolate the house, and watch static pressure for fifteen minutes. If pressure holds steady, it is not a pressure leak at all, and we go looking somewhere else entirely.
Good water leak detection narrows the problem to one line before anybody opens anything. The most expensive mistake available on this kind of job is cutting into the wrong wall, and it is completely avoidable.
Listening, Imaging, and Getting Eyes On It
Once we know which line is leaking, we find where.
Most water leak detection work comes down to this: a pressurized leak makes noise. Water forcing through a pinhole generates a hiss that carries along the pipe and through building materials, and with listening equipment we work the run until we find where that sound peaks.
And in a crawlspace home, there is one more tool that beats all of them. We go under the house and look. That is not a shortcut, it is the advantage of our housing stock, and it is why our first move on most of these calls is a flashlight and coveralls rather than a van full of electronics.
Sometimes It Is Not a Pressure Leak at All
We will tell you honestly when the answer is less involved than the call you were expecting.
A meter that creeps all night is just as often a toilet flapper as a broken pipe. Water pooling near the water heater can be the temperature and pressure relief line doing its job, or a pan drain that was never connected properly, rather than a failed tank. Condensate from a high-efficiency furnace runs water through the same crawlspace all winter and will absolutely fool you.
Drain-side problems are a different job with different tools. We had a call this fall where the complaint was a sewage smell on one side of a house with no backup and nothing visibly wet. That is a camera inspection, not acoustic listening, and we would be wasting your money running the wrong test on it.
Repair, Reroute, or Repipe
Once the leak is pinned down, you have three real options, and the right one depends on what the rest of the pipe looks like.
A spot repair cuts out the damaged length and replaces it. In an accessible crawlspace that is usually the same day, and it is the right call on an isolated failure or physical damage like that knocked-loose line.
A reroute abandons a problem run entirely and brings new pipe through a different path. A repipe does that for the whole house.
Here is the honest version. If this is the second pinhole in the same home in a few years, the first one was not bad luck. The same water, at the same temperature, is working on every other foot of that line, and spot-repairing it again is a bet against your own evidence. When we see that pattern we say so and walk you through a repipe, even though patching it would be the easier sale.
Call Riley Plumbing, Heating, and Air
Riley Plumbing, Heating, and Air is locally owned and operated, and we have been working on Northern Nevada and Tahoe-basin homes since 1999. Our technicians are factory trained, our trucks are stocked, and we answer the phone for plumbing emergencies 24 hours a day. We are licensed in both states: CA License #774078, NV License #85622 C-1, and NV License #85623 C-21B.
We serve Gardnerville, Minden, Carson City, Reno, Zephyr Cove, Indian Hills, and South Lake Tahoe. Call us at 775-293-8855 in Nevada or 530-564-8855 in California, email service@rileypha.com, or schedule online.
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