Repiping and water lines
Repiping and water line repair in Laredo, TX
Some houses have one leak. Others have a pipe system that is wearing out everywhere at once. Older homes in central Laredo often carry several generations of pipe, and knowing what you have is the first step toward deciding whether to keep repairing it or replace it.
- Whole-house and partial repipes
- Main water line from the meter
- Low pressure diagnosis
- Shutoff and pressure valve replacement
Signs it may be time to repipe
- More than one leak in different places within a year or two
- Rusty, brown or cloudy water, especially after the water sits overnight
- Low pressure throughout the house, not just at one fixture
- Visible corrosion, green crust or white mineral buildup on exposed pipe
- Galvanized steel pipe anywhere in the system
- Old valves that leak or will not close
- Plans for a major remodel that will open walls anyway
What is in your walls
Older homes in 78040 may have any of these, sometimes all in the same house. A plumber can usually tell you in a few minutes by looking where the pipe enters the house and under sinks.
| Material | How to recognize it | What to know |
|---|---|---|
| Galvanized steel | Dull gray, threaded joints, a magnet sticks to it | Rusts from the inside, narrowing the pipe and lowering pressure; often the reason for a repipe |
| Copper | Reddish brown, soldered joints | Long-lasting; can develop pinhole leaks in some water conditions |
| CPVC | Cream or tan rigid plastic, glued joints | Common in some eras; can become brittle with age and heat |
| PEX | Flexible plastic, often red, blue or white, crimped or expanded fittings | Most common in repipes today; flexible, fewer joints |
| Polybutylene | Gray flexible plastic, usually from the 1970s to the 1990s | Known for failures; replacement is usually recommended |
| Lead | Dull gray, soft, scratches to shiny silver, no magnet | Found in some very old service lines; ask a plumber and your utility |
Repair, partial repipe or whole house?
Keep repairing
If the pipe material is sound and the leaks were caused by something specific, such as a nail through a line or one bad fitting, repairs make sense.
Partial repipe
Replacing one branch, for example the hot side under the slab or the lines to one bathroom, when the trouble is concentrated in one part of the house.
Whole-house repipe
New supply lines to every fixture, usually run through the attic and down through walls rather than under the slab. This is the choice when the material itself is failing, such as old galvanized pipe, or when leaks keep moving from place to place.
A useful question to ask the plumber: if I fix only this leak, what do you expect to happen in the next few years? An honest answer will help you weigh a repair against a repipe.
Timing matters too. If you are already planning to open walls for a kitchen or bathroom remodel, replacing the supply lines in that part of the house at the same time costs far less than coming back later.
What a repipe involves
- Plan the routes. The plumber maps where new lines will run, usually through the attic in slab homes, and where walls will be opened.
- Permit. A repipe is plumbing work that requires a City of Laredo permit, pulled by the licensed plumber.
- Run the new lines. New lines are installed while the old system stays in service as long as possible, so the water is off for as short a time as practical.
- Switch over and test. Fixtures are connected to the new lines, the system is pressure-tested and the old lines are capped or removed.
- Inspect and patch. The city inspects the work, and then wall openings are patched. Ask in advance whether drywall repair and painting are included or separate.
The main water line from the meter
The yard line runs from the meter to the house. The utility owns the meter; the line on your side is generally yours. When it breaks, you may see a soggy strip of yard, water bubbling near the meter box or the foundation, a sudden drop in pressure or a meter that never stops spinning.
Older yard lines may be galvanized, which corrodes, or early plastic, which can crack as clay soils move. Roots also find and break small leaks. Repair can mean a short spot repair or a new line, either dug by trench or pulled by trenchless methods where the ground allows. Any digging requires a Texas 811 locate first.
If the house has no working main shutoff on your side of the meter, have one installed while the line is open. It is one of the most useful valves in the house.
Low water pressure: where it comes from
| Pattern | Likely cause |
|---|---|
| One faucet or showerhead weak | Clogged aerator or showerhead; mineral scale |
| Hot water weak, cold is fine | Water heater sediment, a failing valve or a hot side problem |
| Whole house weak | Galvanized pipe, a partly closed or failing main valve, a failing pressure reducing valve, or a yard line leak |
| Neighbors weak too | A city system issue; check city announcements |
Pressure that is too high is also a problem. It strains fixtures, supply lines and water heaters. If faucets bang when closed or the relief valve on the water heater drips, ask the plumber to measure the pressure and check whether a pressure reducing valve is needed or failing.
Why this matters in Laredo
Laredo’s own system shows how age catches up with pipe. In February 2022, a corroded 36-inch main serving the southern part of the city ruptured, affecting more than 125,000 people. After the October 2024 citywide boil water notice, the city manager said more than 30% of the city’s water lines are over 50 years old, and the city found more than 200 bad or illegal connections in central Laredo alone. Private plumbing in the same neighborhoods often dates from the same decades.
Old private plumbing also matters for the public supply. Unprotected cross-connections and failed backflow devices can let water flow back into city lines. If your home has irrigation or other connections that need a backflow assembly, see backflow and irrigation.
Sources
Official and primary sources used on this page. Rules change, so check the source before acting on a detail.
- TEEX: Laredo 36-inch water main break and boil water notice (February 2022)
- Texas Tribune: Laredo ends boil-water notice after 11 days (October 2024)
- City of Laredo Building Development Services: permit applications and requirements
- Texas 811: call before you dig
- City of Laredo Ordinance 2024-O-151: 2021 International Plumbing, Fuel Gas and Private Sewage Disposal Codes
Questions
Repiping and water lines: FAQ
How long does a whole-house repipe take?
It depends on the size and layout of the house. Many are done over a few days, with water off for only part of that time.
Is PEX safe for drinking water?
PEX used for drinking water is tested and certified to plumbing standards and is widely used in repipes. Ask the plumber what product and fittings they install.
Will a repipe fix low pressure?
If the cause is corroded galvanized pipe, usually yes. If the cause is a pressure valve, a yard line leak or the city supply, a repipe alone will not.
Do I have to repair drywall myself?
Some plumbers include patching; many do not. Get it in writing before the job starts.
Who fixes a leak at the meter box?
A leak at the meter or on the street side is the utility’s to repair. A leak on the house side of the meter is usually the owner’s. Call the city if you are not sure.
Do I have galvanized pipe?
Look where the water line enters the house and under sinks. Galvanized pipe is dull gray with threaded joints, and a magnet sticks to it. Copper and plastic do not attract a magnet.
Related
Often part of the same call
Talk to a plumber
Call to reach a plumbing company that serves ZIP 78040 in Laredo.