Plastic Water Pipe Locating in the Greater Seattle Area
Locate buried poly, PE, and other non-metallic water lines that standard locators can't see.
RF utility locators rely on conductive metal or a tracer wire to find buried pipe. Polyethylene, PEX, and other plastic water lines often have neither, so they cannot be traced with RF. Simply Leak Detection specializes in locating non-metallic water pipe across the Greater Seattle Area using acoustic methods and specialized locating equipment so the line can be found before anyone digs.

Why plastic pipe is hard to locate
Plastic is non-conductive, so RF utility locators have nothing to follow unless a tracer wire was installed. Most plastic lines do not have tracer wire; without it, the line cannot be traced with RF and must be located acoustically.
That's a real problem when the line needs to be exposed for a repair, a property improvement, or a connection to new infrastructure. Digging blind is expensive and risky.
How we locate non-metallic water lines
We locate plastic lines acoustically, using controlled mechanical signals to map their route. For lines large enough to admit a sonde, we can push a transmitter through and locate it from above.
The output is a clearly marked line on the surface that the dig crew can trust.
When to call for plastic-line locating
Before any excavation near suspected plastic water service lines, when 811 marks have come back incomplete because the water line is owned by the property owner and not the water provider, or when an existing tracer wire is dead.
- ◆Buried plastic/PE water service lines without tracer wire
- ◆Black poly and PVC irrigation mains
- ◆Non-metallic commercial service lines
- ◆Tracer wires that have corroded or been severed
- Isolate the line at the meter or manifold
- Locate the line acoustically with controlled mechanical signals
- Mark the route and deliver a written summary included with the invoice
Non-metallic pipe locating is a specialty - most 811 locators cannot trace plastic lines without tracer wire. We've been locating these lines acoustically across the Greater Seattle Area since 2010 for plumbers, contractors, and property owners who need certainty before they dig.
Three steps. No guessing.
Schedule
Call or message to book a time. We gather details so we arrive ready.
Non-invasive inspection
Acoustic sensors, tracer gas, and other non-invasive techniques - no jackhammers, no guesswork.
Clear written summary
Exact location and photos in a summary of findings included with every invoice.
Other ways we help

Private Utility Locating
Locate private underground utilities before you dig - water (plastic or metal lines), gas, electrical, and any known metallic lines.
Explore service →
Water Main Leak Detection
Pinpoint long underground service-line leaks instead of replacing the entire line.
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Underground Water Leak Detection
Find buried supply-line leaks without trenching your yard, driveway, or landscaping.
Explore service →Need to find a plastic water line? Let's locate it before you dig.
Get your FREE quote today
Suspect a plastic water pipe locating issue? Call now or send a quick message. We respond fast and provide clear pricing before any work begins.