Main Water Line Leak in Arlington: Repair It or Replace It?

A main water line leak can often be repaired when it is a single leak on pipe in good shape. The line should usually be replaced when it is old galvanized or polybutylene pipe, has leaked more than once, or is crushed or cracked along its length. Water line leak detection in Arlington costs about $200 to $500, and the repair or replacement is priced after the leak is found. Call (817) 285-5426.

Our waterline leak detection Arlington visits find the leak spot in the yard so only a small hole is dug.

What is the main water line?

The main water line, also called the service line, is the buried pipe that runs from the city water meter to your house. In Arlington, the homeowner usually owns and maintains the part from the meter to the home. A leak on that side shows up on your bill, not the city's.

The line is often 1 to 3 feet deep. It can run under lawns, driveways, sidewalks and flower beds, which is why finding the exact leak spot matters before anyone digs.

What are the signs of a main water line leak?

The most common signs are a water bill that jumps with no change in use, a meter that keeps spinning when every fixture is off, a soggy or extra-green patch of yard, low water pressure, and water pooling near the street or foundation. In dry Arlington summers, one green strip across a brown lawn is a strong clue.

• A water bill that is higher than last year for the same month.
• The leak indicator on the meter moves with all water off.
• A wet spot, sinkhole or puddle that never dries.
• Low pressure at every faucet in the house.
• Cracks in a driveway or sidewalk over the line.

Our high water bill guide walks through a meter test you can do in 15 minutes.

When is a repair enough?

A repair is usually enough when there is one leak, the pipe is copper, PVC or PEX in good shape, and the line has not leaked before. The tech digs a small hole at the leak, cuts out the bad section and adds a new piece with proper fittings. Most repairs like this are done in a single visit.

Common causes of a single leak include a loose fitting, a tree root pressing on the pipe, or a shovel or fence post that hit the line.

When should you replace the water line?

Replacement is the better choice when the pipe is old galvanized steel that is rusting from inside, polybutylene that is known to crack, when the line has leaked two or more times, or when a camera or pressure test shows damage along much of its length. A new line ends the cycle of repeat leaks and repeat digs.

1. Age and material. Galvanized and polybutylene lines are the most likely to need replacing.
2. Repeat leaks. A second leak on the same line is a sign more are coming.
3. Low pressure. Rust buildup inside old pipe narrows it and drops pressure.
4. Soil movement. Arlington's clay soil can crush or pull apart weak pipe.

Replacement is quoted in person after the line is tested, since length, depth and what sits on top all change the job.

How is a buried water line leak found?

A tech first confirms the leak with a meter test and a pressure test. Then they trace the line's path with a pipe locator and listen along it with an acoustic ground microphone. Some leaks are found with tracer gas pushed into the line. The goal is to mark one spot to dig, not trench the whole yard.

To learn more about the tools, read how leak detection works.

What does water line leak detection cost in Arlington?

Water line leak detection in Arlington usually costs about $200 to $500. The price depends on the length of the line, the depth, and how much hard surface sits on top. You get the price before the visit, and repair options are priced once the leak is marked.

General estimates for Arlington, TX in 2026. Your exact price is confirmed before any work begins.

What should you do while you wait?

If the leak is large, turn off the main valve between uses to save water and protect the yard and foundation. Take a photo of the meter reading so you can show the change. Keep kids and pets away from soft or sunken ground over the line.

Find your valve with our main water shut-off valve guide.