Water Service Line Leak Detection in Lynnwood, WA
- No-dig detection
- Written findings
- Lynnwood and Snohomish County
Your water service line is the buried pipe that carries water from the meter at the street to your home. When it leaks, you pay for water you never use and the leak can undermine soil, driveways and foundations. We locate the leak precisely so a repair means one small excavation, not a trench across your yard.
What is a water service line?
The service line runs from the water main (via the meter and curb stop) to the main shut-off valve in or at your house. In most Washington utilities the line from the meter to the home is the property owner’s responsibility, while the utility maintains the main and the meter. Confirm the exact boundary with your water provider for your address.
Signs of a service line leak
- A water bill that jumps with no change in habits
- The meter dial or low-flow indicator moves with every fixture off
- Low water pressure across the whole house
- Soggy, unusually green or sunken ground between the meter and the house
- The sound of running water when nothing is on
- Warm spots on the floor (hot line) or a wet driveway edge
How we find the leak
We combine several non-invasive methods, because no single tool works on every pipe and soil type.
| Method | What it does |
|---|---|
| Meter and pressure test | Confirms the leak is on your side of the meter and isolates the section of pipe. |
| Acoustic listening and ground microphones | Picks up the sound of escaping water along the line. |
| Leak noise correlator | Uses two sensors to calculate the distance to the leak on metal pipe. |
| Pipe locating | Traces the route and depth of the line so marks are accurate. |
| Thermal imaging | Shows temperature differences from hot-line leaks or wet slabs. |
| Tracer gas | Finds small leaks on plastic pipe where sound is weak. |
What you get
- Leak location marked on the ground with photos
- Written findings you can share with your insurer or landlord
- Repair options: spot repair, pipe replacement or trenchless methods
- A clear price before any digging
Related: underground leak detection, water line repair and replacement, high water bill investigation.
Detection and repair are separate steps
Finding a leak and fixing it need different tools and sometimes different licenses. Doing detection first means the repair quote is based on a known location, depth and pipe condition instead of guesswork. It is also the cheapest step to get wrong: an unlocated leak turns a small repair into a long trench.
How much water a hidden leak wastes
A steady leak of one gallon per minute is 1,440 gallons a day, or about 43,000 gallons a month. Leaks that size often stay hidden because the water drains into soil. If your meter moves with everything off, treat it as a leak until proven otherwise.
Service line materials we see in Lynnwood
| Material | Where it shows up | Typical failure |
|---|---|---|
| Galvanized steel | Older homes (roughly pre-1960s) | Corrodes from inside, pressure drops, pinholes and joint failure |
| Copper | 1960s to 1990s homes | Long-lived, but pinholes and failed solder joints occur |
| Polyethylene / HDPE | Newer or replaced lines | Flexible and corrosion-proof, damage mostly at fittings |
| PEX | Interior lines, some service lines | Fitting leaks and UV damage where exposed |
| Polybutylene (grey) | Some 1970s to 1990s homes | Known for failures; usually replaced when found |
Before we arrive
- Know where your water meter and main shut-off valve are, and clear access
- Turn off irrigation and note any recent landscaping or digging
- Write down the meter reading and the time
- Note where the wet spot, noise or pressure drop appears
Documentation for your insurer or utility
You receive written findings with the leak location, the method used and photos. Utilities and insurers set their own rules for bill adjustments and coverage, so ask them early and keep all repair invoices.
Customer reviews
Frequently asked questions
How long does leak detection take?
Most service line surveys take one to three hours, depending on pipe length, material and access to the meter and shut-off.
Do you have to dig to find the leak?
No. Detection is done from the surface. Digging only starts after the leak is marked, and then only at that spot.
Is the leak my responsibility or the water district’s?
Usually the utility is responsible up to and including the meter, and the owner from the meter to the house. Check with your provider for your address.
Will homeowners insurance cover it?
Policies differ. Many cover resulting damage but not the pipe itself. Our written report helps with claims; your insurer makes the decision.
How do I find my water meter and main shut-off?
The meter is usually in a ground-level box near the street or sidewalk. The main shut-off is where the line enters your house, such as a garage, basement or utility closet.
What if the leak is on the utility side?
Report it to your water provider. We can confirm which side of the meter the leak is on so you call the right party.
What areas do you serve?
Lynnwood, Edmonds, Mountlake Terrace, Mill Creek, Bothell, Mukilteo, Everett, Alderwood Manor and Martha Lake.