By Ricky McFadden, Licensed Master Plumber | Polly Plumbing | License No. RMP-42199 Serving Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County. Based in Keller, TX.
Water Line Repair in Keller TX: When the Leak Is Between the Meter and Your House
The grass along the path from the meter to the front door is inexplicably green. Not the whole lawn — just a strip about two feet wide running from the street toward the house. There has been no rain in two weeks.
Or the water bill arrived and it is $90 higher than last month. No irrigation changes. No new appliances. Everyone in the household has been away for a week.
Or the pressure at every faucet in the house dropped noticeably over the past few months and a pressure gauge at the hose bib shows 32 PSI — well below the 50 to 80 PSI range residential plumbing is designed for.
All three of these are how Keller homeowners first notice a water service line problem. The water service line is the pipe that runs from the city meter at the street, across the yard, through the foundation, and into the home. Most Keller homeowners do not know it exists. It has no shutoff inside the house. It has no visible components. It just sits underground, carrying every gallon of water the home uses, slowly affected by the same Tarrant County clay soil and aging pipe conditions that produce every other underground plumbing failure in this market.
Call (817) 286-3446 any time. Live agents answer 24/7. License RMP-42199.
Written by Ricky McFadden, Licensed Master Plumber at Polly Plumbing in Keller, TX. License RMP-42199. Ricky repairs and replaces exterior water service lines throughout Keller and all of Tarrant County.
What the Water Service Line Is and Why It Fails in Keller
The water service line is distinct from everything else discussed in Polly Plumbing’s guides. It is not the interior supply system covered in the whole home repiping guide. It is not the drain and sewer system covered in the sewer line repair guide. It is not the pipe beneath the slab covered in the slab leak detection guide.
The water service line is specifically the buried exterior supply pipe that runs from the city-owned meter at the property line, across the front or side yard, to the point where it enters the foundation. In Keller homes, this run is typically 20 to 60 feet long, buried 18 to 36 inches deep. The homeowner owns the section from the meter connection to the house. The city owns the section from the water main to the meter.
Three failure mechanisms account for nearly all Keller water service line failures.
Galvanized steel aging. Keller homes built before 1985 frequently have galvanized steel service lines — the same pipe material that causes pressure loss inside aging Keller homes. In exterior applications, galvanized steel faces an additional corrosion mechanism: direct soil contact. The zinc coating depletes from both interior hard water exposure and exterior soil electrochemical corrosion. A galvanized service line from the mid-1970s is now 50 years old and has been corroding from both sides for decades.
Copper pinhole corrosion from clay soil contact. Homes built from the mid-1980s through the early 2000s typically have copper service lines. Copper is more durable than galvanized in exterior applications, but Tarrant County’s Blackland Prairie clay soil documented by the USGS has naturally acidic and mineral-rich chemistry in the subsurface that accelerates exterior pitting corrosion on copper. A copper service line that has been in contact with Keller’s clay soil for 25 to 40 years can develop pinholes from the outside in — a failure mode that has nothing to do with hard water on the inside.
Soil movement at joint connections. The Blackland Prairie clay expands significantly when wet and contracts sharply when dry. The NOAA DFW climate normals document the wet-dry seasonal cycles that drive this. A service line joint that was installed perfectly plumb in dry soil can be stressed by repeated soil movement cycles over decades until the joint develops a slow seep.
A Real Call: The Strip of Green Grass That Cost $180 a Month
Marcus called from a neighborhood near Bear Creek Parkway in Keller. His water bill had been creeping up for four months. He had initially attributed it to the irrigation system. He turned the irrigation off for a month — the bill stayed high. He hired a leak detector who said there was no slab leak. The bill was now $180 per month more than the prior year at the same time.
His wife noticed it: a strip of grass about 18 inches wide running from the meter box to the front of the house. Darker green than the surrounding lawn, slightly softer underfoot.
Ricky arrived and ran a meter test: turned off the interior main shutoff and watched the meter dial. It was spinning. Water was flowing through the meter with every interior valve closed — meaning the leak was between the meter and the shutoff, on the exterior service line.
He located the approximate leak zone using pressure testing and the visual evidence from the lawn strip. The excavation confirmed it: a 1978 galvanized steel service line with a joint failure approximately 22 feet from the meter. The joint had corroded through. Water had been saturating the clay beneath the lawn at that point for an estimated four to six months.
The repair options: spot repair at the failed joint, or full replacement of the 48-foot galvanized run with new copper or PEX. Ricky’s recommendation was replacement. The pipe was 48 years old with documented joint failure and confirmed galvanized corrosion throughout the exposed section. A spot repair at one joint on a 48-year-old galvanized line leaves the rest of the original pipe in the ground. Given its age in this soil, the next failure was not a question of whether but when.
Marcus chose full replacement. The new line was PEX — flexible enough to minimize joint count over the 48-foot run, resistant to the exterior soil corrosion that had degraded the galvanized, and significantly less expensive to install than copper. The work took one day including excavation, installation, backfill, and pressure testing.
The water bill returned to normal the following month.
How to Know If the Problem Is the Service Line
The three tests below can be done by any Keller homeowner before calling. The results will tell Ricky what to bring and what to expect before he arrives.
Test 1: The meter movement test. Find your water meter in the covered box near the curb. Turn off the interior main shutoff — the valve inside the house where the service line enters. Watch the meter dial for 60 seconds. If the meter continues to move with the interior shutoff closed, water is flowing between the meter and the shutoff, meaning the leak is on the exterior service line. If the meter is still, the problem is inside the home.
Test 2: The pressure gauge test. Attach a pressure gauge to an outdoor hose bib and read the pressure with all interior fixtures off. Below 40 PSI with the main valve fully open suggests either a failing PRV or a service line problem restricting flow. Compare the reading to a measurement at an interior faucet — if the hose bib reads significantly lower than an interior faucet, the restriction is on the outdoor line side.
Test 3: The yard visual. Walk the path from the meter box to the foundation. Look for any strip of grass that is noticeably greener, taller, or softer than surrounding lawn. Look for soil depressions or sinkholes above the line path. In dry conditions, any wet area along this path with no surface water source is a strong indicator of a subsurface leak.
Repair vs Replace: The Decision for Keller Service Lines
The repair-versus-replace decision for an exterior water service line follows a clear framework. Unlike interior plumbing repairs, there is no partial-replacement option — excavation is required regardless, and the cost difference between a spot repair and a full replacement is often smaller than homeowners expect.
Spot repair makes sense when: The pipe material is copper or PEX and the line is less than 25 years old. The failure is at a single identifiable joint or fitting. Pressure testing confirms the rest of the line is sound. The home has no history of prior service line problems.
Full replacement makes sense when: The pipe is galvanized steel at any age — a spot repair on aging galvanized leaves the rest of the line in ground that will produce the next failure. The pipe is copper but more than 30 years old in Tarrant County clay soil, which has already produced one pinhole failure. Multiple failures have occurred on the same line in the past five years. The line needs excavation regardless — and full replacement adds relatively little incremental cost to an excavation that was already required.
For Keller homes built before 1985 with original galvanized service lines, Ricky’s consistent recommendation is full replacement. A spot repair on a 40-plus-year-old galvanized service line in reactive clay soil is not the long-term answer.
Pipe Material Options for Keller Service Line Replacement
PEX (cross-linked polyethylene): The preferred material for most Keller service line replacements. PEX is flexible enough to be pulled through the excavated trench with fewer fittings than rigid pipe, resistant to the exterior soil corrosion that degraded galvanized and copper lines, and handles North Texas freeze events better than rigid materials. The fewer the fittings, the fewer the joint failure points.
Copper: More expensive than PEX and rigid, requiring more fittings. Copper remains a good option where HOA design standards specify it or where local code requires it for the service line. In Tarrant County clay soil, the exterior corrosion risk on copper should be addressed with appropriate bedding material during installation.
HDPE (high-density polyethylene): Used primarily for longer runs or where directional boring (trenchless installation) is employed. HDPE is highly resistant to corrosion and soil movement. Appropriate when the yard has features — landscaping, driveways, sidewalks — that make open trench excavation impractical.
What Water Service Line Repair Costs in Keller TX
| Service | Typical Cost (Keller TX 2026) |
|---|---|
| Meter test and leak location | $89 to $200 (dispatch included, credited toward repair) |
| Spot repair at single failure point | $1,200 to $2,800 depending on depth and access |
| Full service line replacement up to 60 feet (EX-008) | $7,947 |
| Full service line replacement over 60 feet | Quoted on site per linear foot |
| Trenchless installation (directional boring) | $4,000 to $9,000 depending on length and soil conditions |
| Dispatch fee | $89, waived for PollyCare members |
All pricing includes excavation, materials, installation, backfill, and pressure testing. City of Keller permit included in replacement pricing. Written quote before any work begins. No emergency surcharge.
Insurance and warranty note: Standard homeowner’s insurance does not cover exterior service line repair or replacement from wear and age. A service line endorsement (available from most insurers for $5 to $10 per month) specifically covers this. Polly Plumbing provides written documentation of the pipe material, failure location, and repair scope for insurance claim purposes.
What Polly Plumbing Does on Every Keller Water Line Call
When you call Polly Plumbing for a water service line problem in Keller or any surrounding Tarrant County city, Ricky asks four questions before arriving: what symptoms led to the call, the home’s build year, whether the meter movement test has been run, and whether the yard shows any visual signs along the line path. Those four pieces shape the diagnostic approach and what equipment to bring.
On arrival he runs the meter test to confirm the leak is on the service line, uses pressure testing to localize the problem zone, and visually confirms with the yard evidence. He presents both the spot repair and full replacement options with pricing in writing before any excavation begins.
For related underground pipe issues: sewer drain line failures are covered in our sewer line repair guide for Keller TX. Interior supply line scale and failures are covered in our whole home repiping guide for Keller TX. Leaks beneath the foundation slab are covered in our slab leak detection guide for Keller TX.
Same-day water line service throughout Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.
Call (817) 286-3446 any time. Live agents answer 24/7. No emergency surcharge.
Frequently Asked Questions About Water Line Repair in Keller TX
How much does water line repair cost in Keller TX?
A spot repair at a single failure point runs $1,200 to $2,800 depending on depth and access. Full service line replacement up to 60 feet runs $7,947 (Polly Plumbing pricebook item EX-008) including excavation, materials, installation, backfill, pressure testing, and permit. Trenchless installation runs $4,000 to $9,000 depending on length and soil conditions. The $89 dispatch fee is waived for PollyCare members. Written quote before any excavation begins. Call Polly Plumbing at (817) 286-3446.
How do I know if my Keller TX water line is leaking?
Three reliable tests. Run the meter movement test: turn off the interior main shutoff, watch the city meter. If it moves, the leak is on the exterior service line. Check the pressure at an outdoor hose bib: below 40 PSI with the main valve fully open suggests a service line restriction or failure. Walk the path from the meter to the house and look for a strip of green or wet grass in otherwise dry conditions. Any one of these warrants a call. Call Polly Plumbing at (817) 286-3446.
Should I repair or replace my Keller TX water line?
Spot repair makes sense for copper or PEX lines under 25 years old with an isolated failure. Full replacement makes sense for any galvanized steel line at any age, copper lines more than 30 years old in Tarrant County clay soil, or any line with multiple prior failures. The excavation cost is required for either option, and the incremental cost to replace versus spot repair is often smaller than homeowners expect. Ricky presents both with pricing on every call. Call (817) 286-3446.
What type of pipe is my Keller TX water service line?
Keller homes built before 1985 typically have galvanized steel service lines. Homes built from the mid-1980s through the early 2000s typically have copper service lines. Homes built after 2000 typically have PEX or copper. The meter movement test confirms whether a failure exists. Excavation at the failure point confirms the pipe material and condition. For older Keller homes with no prior service line inspection, a pressure test and visual yard check provide a preliminary assessment.
Does homeowner’s insurance cover water service line repair in Keller TX?
Standard homeowner’s insurance does not cover water service line repair or replacement from wear and aging. A service line endorsement, available from most insurers for approximately $5 to $10 per month, specifically covers exterior service line failures including excavation and replacement. Polly Plumbing provides written documentation of the pipe material, failure location, and repair scope for insurance claim purposes. Call (817) 286-3446.
Why do Keller TX water service lines fail more often than in other markets?
Two compounding factors. Tarrant County’s Blackland Prairie clay soil has very high shrink-swell potential, documented by the USGS, which stresses buried pipe at joints and fittings through repeated seasonal expansion and contraction. Additionally, Keller’s very hard water at 15 to 25 GPG accelerates interior corrosion on galvanized lines. The combination of exterior soil movement stress and interior hard water corrosion shortens service line lifespan compared to lower-hardness, stable-soil markets.
How long does a water service line replacement take in Keller TX?
Most Keller service line replacements complete in one day. Excavation, pipe installation, backfill, and pressure testing are all same-day scope on runs up to 60 feet. The City of Keller permit inspection is a separate visit scheduled after installation. Landscaping restoration — reseeding or resodding the excavation trench — is the homeowner’s scope after backfill. Polly Plumbing backfills to grade and compact; final surface restoration is typically done by the homeowner or a landscaper.
Written by Ricky McFadden, Licensed Master Plumber, Polly Plumbing. Texas License RMP-42199. Based in Keller, TX. Serving Keller and all of Tarrant County.
Published: May 2026. Last reviewed: May 2026.