Pipe Burst Under House: What to Do (Liberty Hill & Austin Homeowner Guide)

13 hours ago
4 min read

A burst pipe under your house is one of the most stressful plumbing emergencies a homeowner can face—especially in areas like Liberty Hill and Austin where soil movement, aging infrastructure, and sudden temperature shifts can all play a role.

If you’re dealing with this right now, don’t panic. Acting quickly (and correctly) can save you thousands of dollars in damage. This guide walks you through exactly what to do, what to avoid, and when to call a professional like OnCall Plumbing.

First: Know the Signs of a Burst Pipe Under Your House

Before you even see water, your home will usually give you warning signs:

Sudden drop in water pressure
Unexplained spike in your water bill
Warm or damp spots on floors (especially with slab leaks)
Sound of running water when nothing is on
Musty smells or mildew
Cracks in walls or flooring (common with slab leaks in Central Texas)

If you’re noticing any of these, it’s time to act immediately.

Step 1: Shut Off Your Main Water Supply

The most important step is stopping the flow of water.

Locate your home’s main shutoff valve (usually near the front of the home or in a utility box outside)
Turn it off immediately

If you’re unsure where it is, now is a good time to learn—before an emergency happens.

💡 Pro Tip: In Liberty Hill and Austin, many homes have outdoor shutoffs near the street or sidewalk.

Step 2: Turn Off Electricity (If Necessary)

If water is pooling near electrical outlets, wiring, or your breaker panel:

Turn off power to the affected area
If unsure, shut off electricity to the whole home

⚠️ Water and electricity are a dangerous combination—don’t take risks.

Step 3: Drain Remaining Water in Your Pipes

Once the main water is off:

Turn on all faucets (hot and cold)
Flush toilets
Run outdoor spigots

This helps relieve pressure and drains any remaining water from your plumbing system.

Step 4: Minimize Water Damage

The longer water sits, the worse the damage gets.

Take these steps quickly:

Remove standing water with towels, mops, or a wet vac
Use fans and dehumidifiers to dry affected areas
Move furniture, rugs, and valuables away from moisture
Avoid walking on wet flooring if structural damage is suspected

If the pipe burst under your house (crawl space or slab), damage may not be visible—but it’s still happening.

Step 5: Identify Where the Leak Is Coming From

There are typically two scenarios in Central Texas homes:

1. Crawl Space Leak

Easier to access and repair
Often caused by corrosion, shifting pipes, or freezing temps

2. Slab Leak (Common in Austin & Liberty Hill)

Pipes run beneath your concrete foundation
Caused by soil movement, hard water corrosion, or pressure issues

Slab leaks are more serious and usually require professional detection tools.

Step 6: Call a Professional Plumber Immediately

A burst pipe under your home is not a DIY situation.

You need a licensed plumber who can:

Pinpoint the exact location of the leak
Determine if it’s a simple repair or full pipe replacement
Use specialized equipment (especially for slab leaks)
Prevent future issues

For homeowners in Liberty Hill, Austin, and surrounding areas, OnCall Plumbing offers fast emergency response and expert diagnostics.

What Causes Pipes to Burst Under a House?

Understanding the cause can help prevent it from happening again.

Common causes include:

Freezing Temperatures

Even in Texas, sudden cold snaps can freeze and expand water inside pipes.

Soil Movement

Central Texas soil expands and contracts, putting stress on pipes under your home.

Hard Water Corrosion

Austin-area water is known for high mineral content, which can wear down pipes over time.

Tree Roots

Roots can invade and damage underground plumbing lines.

Aging Pipes

Older homes often have pipes that are simply past their lifespan.

How Much Damage Can a Burst Pipe Cause?

Unfortunately, quite a lot—especially if it goes unnoticed.

Potential damage includes:

Foundation issues
Mold growth
Warped flooring
Structural damage
Increased utility bills
Long-term plumbing system failure

The faster you act, the more you can limit these costs.

How to Prevent Pipes from Bursting Again

Once repairs are complete, take steps to protect your home:

✔️ Insulate Pipes

Especially in exposed or vulnerable areas.

✔️ Monitor Water Pressure

High pressure can weaken pipes over time.

✔️ Install a Leak Detection System

Smart systems can alert you before major damage occurs.

✔️ Schedule Regular Plumbing Inspections

A professional can catch small issues before they become emergencies.

Why This Is Common in Liberty Hill & Austin Homes

Homes in Liberty Hill and Austin face unique challenges:

Expansive clay soil that shifts with moisture levels
Older plumbing systems in some neighborhoods
Rapid development causing changes in ground stability
Hard water contributing to pipe wear

Because of this, slab leaks and underground pipe bursts are more common here than in many other parts of the country.

When Is It an Emergency?

Treat it as an emergency if you notice:

Active water flow or flooding
Sudden loss of water pressure
Water coming through floors or walls
Electrical hazards
Rapidly increasing water bill

In these cases, immediate professional help is critical.

Need Help Fast? Call OnCall Plumbing

If you suspect or know you have a burst pipe under your house, don’t wait.

OnCall Plumbing proudly serves homeowners in:

Liberty Hill
Austin
Leander
Bertram
Burnet
Marble Falls
Bastrop
And surrounding Central Texas areas

Why homeowners trust OnCall Plumbing:

Fast emergency response
Advanced leak detection technology
Honest, upfront pricing
Experienced with slab leaks and underground repairs
Licensed and insured professionals

Final Thoughts

A burst pipe under your house can feel overwhelming—but the right steps make all the difference:

Shut off your water
Turn off electricity if needed
Drain your system
Minimize damage
Call a professional immediately

The key is acting quickly. The sooner you respond, the more damage—and cost—you can avoid.

If you’re in Liberty Hill or Austin and need help, OnCall Plumbing is ready to step in and get your home back to normal fast: https://www.oncallplumbingatx.com/contact-us