01Overview
Most plumbing emergencies are one of four things: a supply pipe or connection that has burst or come apart, a fixture overflowing, a drain or sewer backing up into the building, or a water heater leaking. The first job is always the same: stop or contain the water. The repair comes second.
Knowing where your shutoff valves are before anything happens is the single most useful thing you can do. In a house it is usually in the cellar or basement on the front wall, where the service line comes in. In an apartment, each fixture usually has its own small valve, and the building controls the risers.
02Signs you may need this
- Water spraying or pouring from a pipe, fitting or appliance hose
- Water coming through a ceiling or down a wall
- A toilet or tub overflowing and not stopping
- Sewage or dirty water rising from a floor drain, tub or toilet
- A water heater leaking from the tank or the relief valve pipe
- No water at all, or a sudden loud hiss inside a wall
03Common causes
| Emergency | Usual causes | First step |
|---|---|---|
| Burst pipe | Freezing, corrosion in old galvanized or copper, a failed fitting | Close the main shutoff |
| Failed connector | Old braided or rubber supply hose to a toilet, faucet, washer or dishwasher | Close the fixture valve |
| Overflowing toilet | Clog in the toilet or the line below it; stuck fill valve | Close the valve behind the toilet |
| Sewer backup | Blocked building sewer; city sewer full in heavy rain | Stop using water anywhere in the building |
| Water heater leak | Corroded tank, failed relief valve, loose connections | Close the cold-water inlet valve; turn the heater off |
| Leak from above | Bathroom or appliance in the unit above; a riser | Notify the super and the neighbor above |
04Possible solutions
| Problem | Usual fix | Notes |
|---|---|---|
| Burst or split pipe | Cut out and replace the damaged section | Old galvanized may need more replaced than the visible break |
| Failed supply connector | Replace the connector, often the valve too | Good time to replace other old connectors |
| Overflow / clog | Clear the toilet or line; repair the fill valve | Repeated clogs point to a downstream problem |
| Sewer backup | Clear the building sewer; camera inspection afterward | See sewer line repair |
| Leaking water heater | Isolate it; repair connections or replace the heater | A leaking tank usually means replacement |
The right approach depends on what the plumber finds on site. This table is general information, not a diagnosis.
05What affects the cost
Prices are set by the plumber and depend on what's found. These factors usually matter most:
- Time of day and day of week
- How quickly the source can be found and reached
- Pipe material and condition
- Parts needed (valves, connectors, water heater)
- Whether the repair has to be followed by permitted work
06What a plumber typically checks
- Confirms the water is off and the area is safe to work in
- Finds the exact failure point: pipe, fitting, connector, valve, drain or fixture
- Checks for related damage, such as other weak fittings, a frozen section or a blockage downstream
- Makes a temporary or permanent repair and restores water
- Explains what follow-up work is advisable and whether it needs a permit
07By building type
- Apartments
- Your super or managing agent can shut the riser that feeds the leak. A leak from above is often the upstairs unit's responsibility, or the building's if it comes from a riser.
- Brownstones & houses
- The main shutoff is usually in the cellar near the front wall, by the meter. Old gate valves can be stiff; turn them firmly but don't force them with tools.
- Two- & three-family houses
- One main shutoff often serves every unit, so tenants may need to know where it is.
- Condos & co-ops
- Check your building's emergency contact. Many require their own staff to operate building valves.
08Local considerations
New York City
In New York City, a Licensed Master Plumber can file an Emergency Work Notification and start emergency work before the permit filing, so the repair doesn't wait for paperwork. Report sewer backups that come from the city main and street flooding to 311.
Long Island, Westchester & Hudson Valley
Frozen and burst pipes are the most common winter emergency in suburban houses, especially in garages, crawlspaces and exterior walls. Licensing is set by the county, town or village. Ask the plumber for their license.
New Jersey
New Jersey plumbing is performed by licensed master plumbers or under their supervision. Emergency repairs may still need a permit afterward, which the plumber arranges with the municipal construction office.
09Permits & licensing
- NYC: work is done by or under a Licensed Master Plumber; emergency work can start under an Emergency Work Notification. NYC permits
- New Jersey: licensed master plumber; permit through the municipal construction office when required. NJ permits
- Westchester, Nassau, Suffolk: licensing is county- or town-specific
Rules differ by jurisdiction. Compare NYC, Long Island, Westchester and New Jersey.
10Frequently asked questions
Where is the main water shutoff in a NYC house?
Usually in the cellar or basement on the street-side wall, where the service line enters, next to the water meter. There may be valves on both sides of the meter; either stops the water.
Water is coming through my ceiling. Who do I call first?
In an apartment, call the super or management first, then knock on the door of the unit above. Turn off electricity to the affected room at the panel if you can do it safely without standing in water. See water through the ceiling.
Do emergency plumbing repairs need a permit?
Some do. In New York City, a Licensed Master Plumber can start emergency work immediately under an Emergency Work Notification and file afterward. In New Jersey and the NY suburbs, the plumber handles any permit with the local building department.
Should I call a plumber or the gas utility if I smell gas?
The utility or 911, from outside the building. Gas leaks are handled by the utility and the fire department first.
11Emergency Plumbing by area
Local guides
We take calls about emergency plumbing across the region. Choose your area for local building and permit details.
New York City
Long Island & Hudson Valley
New Jersey
12Related
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Sources & review
Last reviewed . General information, not legal or engineering advice. Rules change and individual buildings differ.