Leak Detection & Repair Putnam County, NY
We've been finding hidden leaks in Putnam County homes since 1960. They hide behind walls, under concrete slabs, and inside old copper and cast-iron pipes. We cover it all — how we find leaks, how we fix them, and what to do if you think you have one.
In most cases, we find the source the same day we arrive. How long the repair takes depends on where the leak is and what kind of pipe we're dealing with. We use listening tools and pressure tests to track it down. No guessing. No tearing open walls until we know exactly where to look.
Signs of a Hidden Water Leak in Your Putnam County Home
Most leaks don't announce themselves. We've walked into homes in Mahopac and Carmel where water had been leaking inside a wall for weeks before anyone noticed. Older homes in Putnam County — built between the 1950s and 1980s — still have original copper or galvanized steel pipes in many cases. Those pipes get tired. They fail slowly and quietly.
Here's what to watch for:
Warm or damp spots on your floor — often means something is leaking under the slab
Water stains on ceilings or baseboards with nothing obvious causing them
A musty smell in a room that should be dry
Your water meter spinning when every faucet and fixture is off
A water bill that jumped with no change in how much water you used
If you're seeing any of this, don't sit on it. Small leaks don't fix themselves.
How Plumbers Detect Leaks Without Opening Every Wall
The first thing most homeowners ask us is whether we're going to tear up their house to find the leak. We get it. That's a fair concern. The good news is we usually don't have to. We carry tools that find leaks without touching a wall first. That matters a lot in Putnam County, where many homes run on well water with buried supply lines we can't easily see.
Here's what we use:
Acoustic sensors pressed against walls and floors — they pick up the sound of water moving where it shouldn't
Pressure testing to confirm there's a leak and narrow down which part of the system is losing water
Thermal imaging to find moisture hiding behind finished walls and ceilings
Dye testing near sinks, tubs, and toilets when we suspect a drain-side leak
We show you what we found before we pick up a single tool. You know what's wrong and what the fix looks like before any work starts.
Slab Leaks in Putnam County: Repair
A slab leak is a pipe that breaks inside or under your concrete floor. It sounds scary, but once we know what we're dealing with, there's a clear path to fixing it.
Putnam County winters are hard on pipes under slabs. The ground freezes and thaws, and that movement stresses the pipes over time. On hillside properties in Garrison and Cold Spring, the ground shifts more than most people realize. We've seen that ground movement speed up slab leak problems in homes that are only a few decades old.
Watch for these signs:
A section of floor that feels warm or hot when you walk on it
Cracks forming in the slab
Wet carpet or flooring with no spill to explain it
A water bill that jumped out of nowhere
Once we confirm a slab leak, here's how we fix it:
Spot repair — we open the concrete at the exact break point and fix it there
Pipe reroute — we run new pipe above the slab and bypass the damaged section completely
Epoxy lining — we coat the inside of the existing pipe when the damage is contained
In Putnam County, we reroute a lot. When the pipes under a slab are already corroded, patching one spot usually doesn't hold for long.
Copper Pipe and Pinhole Leaks Common in Older Local Homes
A pinhole leak happens when your water slowly eats through the copper pipe from the inside out. It takes years. But once it starts, it doesn't stop on its own.
We see this a lot in Putnam County. Hard well water is a big part of the reason. High mineral content wears copper down faster than most people expect. In Brewster and Patterson, where homes connect to municipal water, shifting pH levels in the water supply cause the same kind of damage — just on a different schedule. According to EPA research on copper pitting corrosion in household plumbing, water chemistry factors like high pH and elevated chloride levels are recognized causes of widespread pinhole leak problems across communities.
A few things we've learned from working on these pipes:
One pinhole in a 40-year-old pipe is almost never the only one
The same water that caused the first leak is still working on the pipes around it
Discolored or metallic-tasting water often shows up before you ever see a wet spot
What we do about it depends on how far the damage has gone:
Solder patch — works when it's a single pinhole in pipe that's otherwise in good shape
Section swap — we replace the damaged stretch and leave the rest of the system alone
Full repipe to PEX — the right move when the copper throughout the house has run its course
We'll look at what's there and tell you straight what makes sense.
What Happens If You Ignore a Small Drip Behind the Wall
A drip behind a wall is easy to ignore. You can't see it. Nothing has failed yet. But we've been in homes where a slow leak ran for months before anyone called, and the repair bill was ten times what it would have been early on.
Putnam County winters make it worse. A slow drip that freezes and thaws through the cold months can turn into a burst pipe by spring. In older homes in Cold Spring with original plaster walls, the moisture hides longer than it does behind drywall. By the time a stain shows up on the surface, the damage behind it has been building for weeks.
Here's what a slow leak does while you wait:
Mold can start growing within 48–72 hours of steady moisture behind a wall, and it spreads through wall cavities long before any visible signs appear on the surface
Wood framing and subfloor material rot silently — often for weeks before you see anything
Insurance rarely covers water damage from neglect when there's a record of how long it was left
A small repair now costs a fraction of what full mold cleanup and structural work runs later
It's not going to get better on its own.
Is Your High Water Bill a Sign of a Pipe Leak or Gas leak?
A water bill that spikes for no clear reason is one of the most common calls we get. It's worth taking seriously. A hidden water leak is behind it more often than not. A detection leak is needed.
If you're on well water in Putnam County, you don't get a bill that flags the problem. What you can watch is your pump. If it's running more than usual or kicking on at odd times, that's a sign worth following up on. A flow meter check can show water loss that you'd never catch otherwise.
For everyone else, here's a simple check you can do before you call:
Write down your meter reading and wait two hours without using any water in the house
Check the meter again — if it moved, water is going somewhere it shouldn't
Look at your toilets first — a running toilet is the most common reason bills jump
Pull two bills from the same season — Brewster and Southeast municipal customers can compare year over year to spot the difference
If the meter moves with everything off, you have a leak. Call us and we'll find it.
FAQs
How fast can a plumber find a leak in my Putnam County home? Most leaks are located in one visit using acoustic sensors and pressure testing. Exact time depends on your home's size and pipe layout.
Do I need to open my walls for leak detection? No. Acoustic sensors, thermal imaging, and pressure testing find most leaks before any demo work begins.
What if I have well water — can you still detect leaks on my system? Yes. Pressure testing and acoustic tools work on well-fed systems. Pump cycle monitoring can also flag suspected water loss on your property.
My pipes are original from the 1960s. Should I repair or replace? It depends on the pipe material, condition, and where the damage is. We look at it on-site. One pinhole in very old pipe often means a section replacement makes more sense than a patch.
Can a hidden leak cause mold in Putnam County homes? Yes. Slow leaks inside walls create steady moisture. Mold can start growing within 48–72 hours and spread through wall cavities before you see any sign of it.
How do I know if my slab has a leak versus a drain issue? Warm floor spots and higher water use on the supply side point to a slab leak. Drain leaks usually show up as odor or slow drainage. We confirm the source with pressure isolation before any repair begins.