Whole-Home Leak Detection That Finds What You Can't See
How Whole-Home Leak Detection Works
We use a combination of pressure testing, acoustic listening equipment, and thermal imaging to locate leaks without tearing into walls or pulling up flooring unnecessarily. The process is methodical and non-invasive wherever possible. We work through your system section by section — supply lines, fixtures, drain connections, and any areas flagged by elevated water usage or visible moisture — and document what we find before recommending any repair work.
The goal is clarity. You'll know exactly where a leak is, how significant it is, and what it will take to fix it. No vague assessments, no pressure to approve work on the spot.
Water leaks don't announce themselves. They work quietly behind walls, under slabs, and inside ceilings — driving up your water bill, softening your framing, and setting the stage for mold long before you notice anything wrong. By the time a stain appears or a floor starts to buckle, the damage is already done. Whole-home leak detection gives you a clear picture of what's happening inside your plumbing system before a small problem becomes a large repair.
Hidden Leaks Cost More the Longer They Go Undetected
What We're Looking For During an Inspection
A whole-home leak detection visit covers the full plumbing system, not just the obvious spots. Common findings include:
- Pinhole leaks in copper supply lines, often caused by corrosion or water chemistry
- Slab leaks running beneath concrete foundations
- Leaking connections at fixtures, valves, and shut-offs
- Slow drips inside wall cavities that haven't yet reached visible surfaces
- Deteriorating supply hose connections behind appliances
- Underground line leaks between the meter and the home
If we find something, we'll show you. If we don't, you'll have documentation confirming your system is in good shape — which is worth knowing too.
Who Benefits Most from a Whole-Home Leak Inspection
Leak detection isn't only for emergencies. Homeowners across King and Snohomish County schedule inspections for a range of practical reasons:
- Water bills that have crept up without an obvious explanation
- Pre-purchase inspections on older homes before closing
- Post-winter checks after extended freezing temperatures
- Older homes with original copper or galvanized plumbing still in place
- Homes with a history of repairs where the source was never fully confirmed
- New homeowners who want a baseline understanding of their system's condition
If something feels off — a sound you can't place, a smell near a wall, a meter that keeps moving — a leak detection visit is the right first step.
Frequently Asked Questions About Whole-Home Leak Detection
How long does a whole-home leak detection visit take?
Most inspections take between one and three hours depending on the size of the home and how accessible the plumbing is. Larger homes or systems with multiple problem areas may take longer. We'll give you a realistic time estimate before we start.Most inspections take between one and three hours depending on the size of the home and how accessible the plumbing is. Larger homes or systems with multiple problem areas may take longer. We'll give you a realistic time estimate before we start.Will you have to open walls or cut into the floor to find a leak?
Not necessarily. We use non-invasive equipment first — pressure testing and acoustic detection can often pinpoint a leak's location without any demolition. If we do need to access a wall or floor cavity to confirm a finding or make a repair, we'll tell you exactly why before doing anything.Not necessarily. We use non-invasive equipment first — pressure testing and acoustic detection can often pinpoint a leak's location without any demolition. If we do need to access a wall or floor cavity to confirm a finding or make a repair, we'll tell you exactly why before doing anything.What's the difference between a leak detection visit and a standard plumbing inspection?
A standard inspection evaluates visible plumbing components for condition and code compliance. Leak detection is specifically focused on finding active or developing leaks — including ones that aren't yet visible — using diagnostic equipment designed for that purpose. The two serve different goals.A standard inspection evaluates visible plumbing components for condition and code compliance. Leak detection is specifically focused on finding active or developing leaks — including ones that aren't yet visible — using diagnostic equipment designed for that purpose. The two serve different goals.Can a whole-home leak detection visit find slab leaks?
Yes. Slab leaks are one of the more common findings in homes with older copper supply lines, and they're one of the harder problems to identify without proper equipment. Acoustic listening tools can detect the sound of water moving under a concrete slab and help narrow down the location before any concrete work begins.Yes. Slab leaks are one of the more common findings in homes with older copper supply lines, and they're one of the harder problems to identify without proper equipment. Acoustic listening tools can detect the sound of water moving under a concrete slab and help narrow down the location before any concrete work begins.Do you offer leak detection in Seattle and the surrounding area?
Yes. We serve Seattle and communities throughout King and Snohomish County, including Bothell, Kirkland, Bellevue, Redmond, Edmonds, Lynnwood, and beyond. If you're not sure whether we cover your area, call us or use the contact form and we'll confirm quickly.Yes. We serve Seattle and communities throughout King and Snohomish County, including Bothell, Kirkland, Bellevue, Redmond, Edmonds, Lynnwood, and beyond. If you're not sure whether we cover your area, call us or use the contact form and we'll confirm quickly.
Timberline Plumbing Serves King and Snohomish County
We're based in Bothell and Brier, and we work throughout the region — from Seattle to Sammamish, Kirkland to Lynnwood. Whole-home leak detection is one of the more detail-oriented services we offer, and it's one we take seriously. Finding a leak accurately the first time saves our clients money, prevents unnecessary demolition, and keeps small problems from turning into major repairs. If you're concerned about what might be happening inside your plumbing system, we're the right call.
