The main water line is the one pipe you never see and cannot live without. It runs from the city meter at the curb to the shutoff valve at your house, usually 18 to 36 inches down, and it carries every gallon the home uses. When it fails, the symptoms are vague at first: a damp patch in the yard, a bill that crept up, a shower that is not quite as strong. By the time it becomes obvious, the leak has often been running for weeks.
This guide covers how to tell if yours is leaking, why Houston lines fail early, how the repair is done, and what drives the price. If you suspect a leak, the visit to find it is free, and you can call or text (713) 409-7176 any time.
What Counts as the Main Water Line
In Houston, the city owns the main under the street and the meter in the box at the curb. The homeowner owns everything from the house side of the meter to the house: the service line across the yard, the shutoff valve where it enters, and any pressure reducing valve on it. If the leak is in the meter box on the street side, call 311. If it is on your side, it is yours.
Most homes have a 3/4 inch or 1 inch line. Older neighborhoods often still have galvanized steel; subdivisions from the late 1970s through the mid 1990s frequently got polybutylene, the gray plastic pipe that fails from the inside. Newer homes have copper or PEX.
Signs the Line Is Failing
- A wet spot or green strip in the yard between the meter and the house that does not dry out. Our guide to wet spots in the yard covers how to tell a water line leak from a sewer or sprinkler leak.
- The meter moves with everything off. Close every faucet, pause the ice maker and irrigation, and watch the meter for ten minutes. Movement means water is leaving the system.
- Low pressure at every fixture at once. One weak shower is a fixture problem. The whole house dropping is the line or the city. See low water pressure in Houston.
- A water bill that jumped with no change in how the household uses water. The high water bill guide walks through the meter test.
- Water at the slab edge, the sound of running water at the house shutoff, or rusty water after a pressure drop.
Why Houston Lines Fail Early
Houston’s clay soil swells when wet and shrinks when dry, and the buried line moves with every cycle until joints work loose and brittle pipe cracks. Galvanized steel rusts from the inside until it pinholes. Polybutylene reacts with chlorine and fails without warning. Live oak and pine roots crush lines at joints, shallow burial exposes them to mowers and fence posts, and driveway loads crack pipe under concrete, which is also the hardest spot to reach.
Repair or Replace?
| Situation | Usual answer |
|---|---|
| First leak on copper or PEX, rest of the line sound | Spot repair |
| Any leak on polybutylene | Full replacement (the pipe cannot be trusted) |
| Second leak on galvanized steel | Full replacement |
| Leak under the driveway or sidewalk | Often replacement by boring, since the patch would require cutting concrete |
| Line is 1/2 inch or undersized for the house | Replacement with a larger line |
| Leak at the meter connection or house shutoff only | Repair the fitting or valve |
One break on good material is a repair. Anything on polybutylene, or a repeat break on old steel, is a replacement, because the next hole is already forming along the run.
How the Line Is Replaced
| Method | How it works | Best for | Yard impact |
|---|---|---|---|
| Open trench | Dig a trench the full length, lay new pipe, backfill | Short runs, open lawn, ground already disturbed | A strip of lawn is dug up and re-sodded |
| Directional boring | Bore under the yard from a pit at the meter to a pit at the house, pull new pipe through | Driveways, sidewalks, mature landscaping, long runs | Two small pits, roughly 2 by 3 feet each |
Most Houston replacements are bored. It avoids cutting the driveway, keeps the front yard intact, and is usually done in a day.
Materials: PEX is the usual choice in Houston, since it flexes with clay movement and resists scale. Type K copper is still used where preference calls for it, and HDPE is common on long bored runs. Our PEX vs. copper comparison covers the trade-offs.
What the Job Involves
- Locate the leak with acoustic equipment. This leak detection step decides whether a spot repair is even an option.
- Call 811 for utility marks and pull the city permit, which is included in the quote.
- Shut off at the meter and dig the pits or trench. Know how to shut off your water main yourself in case the leak worsens before the appointment.
- Bore or trench and install the new line, with a new house shutoff if the old gate valve no longer closes.
- Pressure test, flush, schedule the inspection, backfill, and replace sod.
What Drives the Price
- Length from meter to house. A 30 foot run is a different job than 120 feet across a large lot.
- Depth, soil, and what is in the way. Driveways, sidewalks, and mature trees push the job toward boring.
- Pipe size. Upsizing from 3/4 to 1 inch adds material but fixes chronic low pressure in larger homes.
- Meter coupling and house shutoff replaced at the same time if corroded or seized.
- Restoration and permit. Sod, cut sprinkler lines, concrete patching, and the city inspection, which belongs in any honest quote.
Houston Market Ranges
These are general Houston market ranges for 2026 to help you judge a quote. The actual price depends on the items above, and Hugo prices water line work on site after locating the leak.
| Job | Market range (Houston, 2026) |
|---|---|
| Spot repair, exposed leak in open lawn | $600 to $1,500 |
| Spot repair under driveway or sidewalk | $1,500 to $3,500 |
| Full replacement, open trench, under 50 feet | $2,000 to $4,500 |
| Full replacement, open trench, 50 to 100 feet | $3,500 to $7,000 |
| Full replacement, directional boring, typical run | $3,500 to $8,000 |
| Add-ons: new house shutoff, PRV, 1 inch upsizing | $300 to $1,200 each |
Will Insurance Help?
A standard homeowners policy covers the water damage inside but usually not the buried line. Many carriers sell a service line rider that does. The service line coverage guide explains what to read before you file.
When to Call
Call Hugo Plumbing when the meter moves with everything off, when a wet spot in the yard will not dry, when the whole house loses pressure, or when you already know the line is galvanized or polybutylene and want it replaced before it fails. If water is actively pooling, shut off the meter valve first and then call.
The visit to find the leak is free, with no trip charge or diagnostic fee, and the repair or replacement is a flat written price before any digging starts. Permits and the city inspection are in the quote. Financing is available on larger jobs, there is a $30 coupon on any repair or replacement, and customers 55 and older or military receive 10% off. Licensed master plumbers (MPL 41319) are available 24/7 at (713) 409-7176, and repiping the house interior can be quoted at the same visit if the inside pipe is the same vintage.
Frequently Asked Questions
Who is responsible for the water line from the street to the house in Houston?
The homeowner. The city owns the main under the street and the meter itself. Everything on the house side of the meter, including the pipe across your yard and the shutoff valve at the house, is yours to repair and replace. If the leak is on the street side of the meter, call the city instead of a plumber.
How do I know if my main water line is leaking?
Turn off every fixture and appliance, then watch the meter. If the small leak indicator or the dial moves with nothing running inside, water is leaving the line somewhere between the meter and the house. A soggy or unusually green strip of yard between the two, a sudden pressure drop at every faucet, or a bill that jumped with no change in habits are the other classic signs.
Can a main water line be replaced without digging up the yard?
Usually, yes. Directional boring pulls a new PEX or HDPE line under the yard, driveway, and sidewalk from one small pit near the meter to another at the house. Open trenching is still used when the run is short, the ground is already torn up, or there are too many other utilities in the path to bore safely.
Is it better to repair or replace a leaking water service line?
Repair a first break on copper or PEX if the rest of the line is sound. Replace the whole line when it is galvanized steel or polybutylene, when this is the second leak, or when the pipe is undersized for the house. Patching an old line that is failing from the inside only buys time until the next hole opens a few feet away.
How long does main water line replacement take?
Most Houston residential service lines are replaced in a single day. Boring a typical 40 to 80 foot run, connecting at the meter and the house shutoff, pressure testing, and backfilling the two pits usually takes four to eight hours. Driveway cuts, a very long run, or a permit inspection that lands the next morning can stretch it to two days.
If your water line won’t hold, call Hugo.
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