Immediate Action: Do This Now
- Close the main water shutoff. In most Dallas homes it is where the line enters the house (often near the front hose bib or in the garage), or at the meter box near the curb, which may need a meter key.
- Keep people and pets away from water near outlets, cords, appliances, and the electrical panel. Only switch off breakers if you can reach the panel while standing somewhere dry.
- If the leak is from one fixture or appliance, its own shutoff valve may stop it: under sinks, behind toilets, behind the washer, or on the cold line above the water heater.
- Move furniture, rugs, and electronics away from the water.
- Request emergency plumbing help and say whether the water is still running.
What Causes a Major Water Leak?
Large leaks usually come from a failure under pressure on the supply side, rather than a slow drip from a drain.
Failed supply line
Braided or plastic lines to toilets, faucets, ice makers, and washing machines can rupture without warning.
Burst pipe
Often freeze-related, or a corroded section that finally gave way.
Water heater failure
A tank or its connections can release a lot of water. See water heater leaking.
Broken service line
Water surfacing in the yard or driveway may be the line between the meter and the house.
How Serious Is a Major Water Leak?
Water damage escalates by the hour. Drywall and insulation wick water upward, wood floors cup, and mold can begin growing within a day or two in a warm Dallas house. If water is near electrical outlets or the panel, the electrical risk is more urgent than the water damage.
What Should You Do Before the Plumber Arrives?
- Keep the water off and note where the water appeared first; it helps the plumber find the source.
- Leave cabinet doors open and pull wet items out so areas can dry.
- Do not run appliances that use water.
- Photograph damage before cleanup for insurance.
Can It Be Repaired or Does It Need Replacement?
Most major leaks are fixed by replacing the failed part: a supply line, a fitting, a valve, or a section of pipe. Repeated leaks in the same system, or leaks in old galvanized or polybutylene pipe, are a sign the plumbing may need partial or whole-house repiping.
How Much Can Emergency Major Water Leak Repair Cost?
Emergency and after-hours visits typically cost more than scheduled work, and the total depends on what failed and how hard it is to reach. We do not publish a price for this specific repair. See emergency plumber cost for published ranges with linked sources, and ask before work starts whether there is a dispatch or after-hours fee and whether it is credited toward the repair.
Related Problems
FAQs
How do I know which shutoff to use?
If you can see the leak coming from one fixture, use that fixture’s valve. If not, or if the valve will not close, use the main.
Can a plumber come out after hours?
Availability depends on the plumber who accepts your request. Confirm arrival time and any after-hours charge when they contact you.
Shut off the water first if you can, then request emergency help.