Signs of a failing water service line
Wet area between street and house
Standing water, soft ground, or a warmer patch in colder months during dry weather.
Whole-house pressure loss
Every fixture drops around the same time — a pressure test confirms where the drop is happening.
Unexplained metered use
Check the low-flow indicator with nothing running inside — if it keeps moving, water is going somewhere.
Discolored water linked to the line
Sudden rusty water, especially after nearby street work — different from a single-fixture cause.
Water main, service line & interior pipe
Service line
For most domestic services 2″ and smaller, customer responsibility generally begins at the curb box toward the building.
Water main
The larger street pipe, owned and maintained by Jamestown BPU, not individual homeowners.
Curb stop
A shutoff valve near the property line — not intended for a homeowner to open without help.
How underground leaks are located
Finding the approximate location before digging helps limit how much of the yard or driveway gets disturbed. A plumber typically starts by reviewing symptoms and meter readings, then narrows the likely area using listening equipment that picks up the sound of escaping water, plus pressure testing sections of the line. A visual check of exposed piping adds useful information too — see how underground leak detection works. Soil, pipe depth, and background noise all affect the results, so this points to a likely area rather than a guaranteed exact spot until the ground is opened.
Permits, utility marking & pressure testing
Confirm symptoms & system
Confirming symptoms point to the service line rather than an interior pipe, a fixture, or a main-side issue.
Inspect & test on site
Physical inspection and pressure testing verify the problem; underground lines are marked before any digging begins.
Explain findings & next steps
A plain-language explanation of options and limits, then scheduling and coordinating any permits or utility marking.
Deciding the right approach
A targeted repair may be enough
A single joint or short section, with the rest of the line in reasonable condition.
Replacement may be more practical
The line has failed more than once, or shows deterioration along most of its length.
Trenchless methods like pipe bursting or lining can reduce digging, but fit depends on pipe material, depth, and what sits above the line.
Restoring the yard or pavement
Any excavation, whether a small access hole or a full trench, leaves ground that needs to be put back afterward — typically backfilling and compacting the soil, then restoring grass, landscaping, or a gravel or paved surface. Full restoration, such as new sod, seed, or a pavement patch, sometimes happens on a separate visit since the ground needs time to settle. If the work affects a sidewalk, driveway apron, or street-adjacent area, additional coordination with the city may apply — ask what’s included and what’s handled separately before work begins.
Main water line FAQs
Is the water line from the street my responsibility?
Generally from the curb box toward the building for most domestic services. BPU maintains the public main.
Can a water line leak cause low pressure everywhere?
Yes — since it’s the single pipe bringing water in, a leak can lower pressure at every fixture at once.
How is an underground leak located?
Symptoms, meter readings, listening equipment, and pressure testing narrow it to a likely area.
Can the line be replaced without a full trench?
Sometimes — trenchless methods don’t fit every situation and depend on material, depth, and site.
What material is used for a new service line?
Common options include copper, PEX, and HDPE — the right choice depends on code, budget, and site conditions.
How long will the water be off?
Depends on scope — a contained repair may restore service same day; full replacement can take longer.
Water flooding your yard or basement?
Treat it as an emergency — call now.