This page covers what to do before help arrives, how to tell which problems can wait until morning, and what an emergency plumber will typically check when they get there.
First steps in any plumbing emergency
- Shut off the water. Use the fixture valve if the problem is at one fixture; otherwise close the main shutoff, usually where the water line enters the house or at the meter.
- If water is near outlets, cords or the electrical panel, keep away from it. Switch off the affected circuits at the panel only if you can reach the panel without standing in water.
- For a leaking water heater, turn off its cold-water inlet valve and switch off the power (electric) or turn the gas control to the off or pilot position.
- Open a low faucet to drain remaining pressure from the lines when a pipe has burst.
- Stop using all drains if sewage is backing up. Every flush or shower adds to the overflow.
- Move valuables, rugs and electronics away, and photograph damage for insurance before cleanup.
If you smell gas, do not operate switches or appliances. Leave the building and call your gas utility or 911 from outside.
What this service solves
- Active leaks and burst supply pipes
- Sewage backing up into tubs, showers or floor drains
- Overflowing toilets that will not stop
- Water heaters leaking from the tank
- Loss of all drainage or all water supply
- Flooding in basements or crawl spaces
Common symptoms
- Water coming through a ceiling, wall or light fixture
- Water pooling around the base of a water heater
- Sewage odor with water rising in the lowest drain in the house
- A sudden drop in water pressure throughout the house along with a hissing sound
- Toilet water rising to the rim after every flush
- The water meter dial spinning while every fixture is off
Most likely causes
Pipe failure
Freezing, corrosion, high water pressure, loose fittings and age can all cause a pipe or fitting to split. Supply lines are under constant pressure, so a failure keeps leaking until the water is shut off.
Main drain or sewer blockage
When the main line clogs, every fixture drains to the lowest opening in the house. That is why sewage often appears first in a basement floor drain or a ground-floor shower.
Water heater tank failure
Most tank-type heaters eventually leak as the inner tank corrodes. A leak from the tank body itself cannot be patched; a leak from a fitting or valve often can.
Fixture supply line failure
Braided or plastic supply hoses under sinks, toilets and washing machines are a common source of sudden indoor flooding.
How the problem is diagnosed
- Confirm the water source: supply (clean, pressurized), drain (dirty, only when fixtures run) or outside water (rain, groundwater).
- Check whether one fixture or the whole house is affected. Whole-house symptoms point to the main supply or the main drain.
- Read the water meter with all fixtures off to confirm a hidden supply leak.
- For backups, a plumber typically opens the cleanout to see whether the blockage is inside the house or further out in the sewer lateral.
Repair and replacement options
| Option | Best for | What to know |
|---|---|---|
| Temporary stop and make-safe | Night or weekend failures | Isolating a fixture, capping a broken line or bypassing a failed valve so water can be restored to the rest of the house until a permanent repair. |
| Permanent spot repair | A single failed pipe, fitting or valve | Cutting out the damaged section and replacing it with matching or approved material. |
| Main line clearing | Sewage backups | Cabling or jetting the main drain from a cleanout, often followed by a camera inspection to find the cause. |
| Fixture or appliance replacement | Failed water heaters, toilets or supply hoses | Replacement is often the only real fix when the component itself has failed. |
What a plumber normally does
- You shut off water (or the fixture valve) and describe what is happening.
- The plumber confirms the source and stops the active problem.
- They explain whether the fix is temporary or permanent, and what the permanent options are.
- Water and drainage are restored to as much of the house as safely possible.
Emergency warning signs
- Any water near electrical outlets, panels or appliances
- Sewage in living spaces
- Smell of gas or rotten eggs near a gas appliance (leave and call the gas utility first)
- Water heater leaking with scorch marks, a pilot problem or a relief valve discharging continuously
- Ceilings sagging or bulging from trapped water
If you see any of these, shut off water first. See emergency plumbing steps.
What affects the cost
We don’t publish national price figures because real quotes vary too much by region, access and the condition of your system. These are the factors that move the price:
- After-hours, weekend or holiday timing
- How quickly the source can be found and accessed
- Whether a temporary make-safe or a full repair is done on the first visit
- Pipe material and condition near the failure
- Drywall, flooring or concrete that must be opened to reach the problem
- Equipment needed, such as jetters or inspection cameras
Ask for a written quote that names the method, materials and any permit or restoration work before work begins.
DIY vs. calling a professional
Reasonable for homeowners
- Finding and closing the main water shutoff
- Turning off a water heater's supply and power
- Plunging a single clogged toilet that has not overflowed into living space
- Removing standing water with a wet vacuum once the source is stopped
Call a professional for
- Any pipe that is leaking inside a wall, ceiling or slab
- Sewage backups affecting more than one fixture
- Gas appliance problems
- Water heater tank leaks or relief valve discharge
Prevention and maintenance
- Label the main shutoff and make sure everyone in the house knows where it is.
- Exercise the main valve once or twice a year so it does not seize.
- Replace rubber washing-machine hoses with braided hoses, and inspect all supply lines every few years.
- Insulate pipes in exterior walls, crawl spaces and garages in freeze-prone areas.
- Have a water heater checked when it approaches the end of its typical lifespan.
Emergency Plumbing: common questions
What counts as a plumbing emergency?
A plumbing emergency is anything causing active water damage, a sewage backup, a gas concern, or the loss of all water or drainage. A dripping faucet or a single slow drain can usually wait; a burst pipe or water coming through a ceiling cannot.
Where is my main water shutoff valve?
In most homes it is where the water line enters the building: a basement wall facing the street, a utility room, near the water heater, or in a garage. In warm climates it may be outside near the foundation. If you cannot find one, the curb stop at the meter box can be closed with a meter key.
Should I turn off the water heater if I shut off the main?
If the shutoff will last more than a short time or the heater itself is leaking, yes. Turn electric heaters off at the breaker and set gas heaters to pilot or off. This protects the heating elements and burner if the tank loses water.
Is a sewage backup dangerous?
Yes. Sewage contains bacteria and viruses. Keep children and pets away, avoid skin contact, do not use any drains, and wear gloves and boots if you must enter the area. Porous materials soaked by sewage, such as carpet pad, usually need to be discarded.
Can an overflowing toilet wait until morning?
If closing the toilet's shutoff valve stops the overflow and other toilets still work, it can usually wait. If every drain is backing up, it is a main line problem and should be handled sooner.
Is a leaking water heater an emergency?
A heater leaking from the tank is urgent because the leak will grow and the tank can release a large volume of water. Shut off the cold inlet valve and the power or gas. A small drip from a drain valve or fitting is less urgent but should still be checked soon.
What should I do if a pipe bursts?
Close the main water shutoff, keep clear of electrical hazards, open a low faucet to drain the lines, and remove what water you safely can. Then arrange a repair; the pipe will not reseal on its own.
Will homeowners insurance cover emergency plumbing damage?
Many policies cover sudden and accidental water damage but not gradual leaks or the cost of repairing the failed pipe itself. Coverage varies widely, so document the damage with photos and call your insurer to confirm.
Why is water coming up through my basement floor drain?
Water rising in a floor drain is most often a main sewer blockage, because the floor drain is the lowest opening on the system. In some areas heavy rain overloading the municipal sewer can cause the same symptom.
Emergency Plumbing in specific cities
Local conditions change how this problem shows up. These city guides cover local factors in depth:
