01 / 05
Burst pipes
A split line runs until the main is closed. Frozen pipes often fail on the first thaw, not during the freeze, so a quiet pipe is not a safe one.
Burst pipe steps →The first hour of a plumbing problem
24 Hour Emergency Plumbing Guide
Water where it should not be is a race against volume. Close the valve, protect what you can, write it down, then decide who to call. This guide walks each step in plain language.
Rule one
Close the Valve Before You Do Anything Else
A half-inch supply line can move several gallons a minute at normal household pressure. Towels, buckets and phone calls do not change that number. Closing a valve does.
That is why every guide on this site starts in the same place: the main shutoff, or the small fixture stop behind the toilet or under the sink. Learn where yours are on a calm afternoon, label them, and make sure everyone in the house can turn them.
How to find and close your shutoffsTriage tool
What to Do Right Now
Pick what you are seeing. You get the first moves in order, a plain read on how urgent it is, and the guide to read next.
What is happening right now?
Act now
Stop the water at the source
- Close the main shutoff. Usually where the water line enters the house: basement wall, crawlspace, utility closet, garage, or beside the water heater. Turn a lever a quarter turn so it sits across the pipe; turn a round wheel clockwise until snug.
- Keep away from wet electrics. If water is reaching outlets, a panel, or appliances, do not stand in it to reach them. Shut the breaker only if you can get to the panel while dry.
- Open a cold tap on the lowest floor to drain pressure from the lines once the main is closed.
- Photograph the break and the spread before you clean up, then start moving water out and belongings away.
Act now
Stop the bowl from filling
- Close the toilet stop valve on the wall or floor behind the bowl: turn the oval handle clockwise until it stops.
- No valve, or it will not turn? Lift the tank lid and raise the float (ball or cup) to stop the fill, then close the main.
- Do not flush again. A second flush adds a full tank to a bowl that already cannot drain.
- Check other drains. If a tub or floor drain is also backing up, treat it as a sewer backup.
Act now
Stop adding water to the drains
- Stop using every fixture: no flushing, showers, laundry, or dishwasher. Everything you run lands at the lowest drain.
- Keep people and pets away from the wastewater. Gloves and boots if you must walk through it.
- Do not pour chemical openers into a main line backup; they rarely reach the blockage and make the work riskier for whoever clears it.
- Ask a licensed plumber about a main line or cleanout and, if you are on public sewer, ask your local sewer utility whether the problem is on their side.
Act soon
Shut off water and energy to the tank
- Close the cold water supply valve on the pipe at the top of the tank.
- Turn off the energy source: the breaker for an electric heater; the gas control set to off or pilot for a gas heater, following the label on the unit.
- Watch for scald risk. Water from the relief valve or drain can be very hot. Do not open fittings you are unsure of.
- Smell gas at any point? Stop. Leave the house and call from outside.
Leave now
This is not a plumbing DIY
- Get everyone out and leave the door open behind you if it is easy.
- Do not switch anything on or off, do not use a lighter, and do not start a car in an attached garage.
- Call your gas utility or 911 from outside, well away from the house. Utilities publish an emergency number on the bill and website.
- Stay out until responders say it is safe. Repairs to gas lines are licensed work in most places.
Act now
Treat it as water plus electricity
- Close the main shutoff to stop supply lines, even if you are not sure which line is leaking.
- Turn off the circuit feeding the wet light or ceiling fan at the panel, if you can reach it without standing in water.
- Put a bucket under the drip and keep people out from under a sagging ceiling.
- Photograph the ceiling and the room for records before anything is opened up.
Check first
Find out whether it is just your home
- Ask a neighbor or check your water utility for a main break or planned work notice.
- In freezing weather, a frozen line is likely. Leave the taps open and see the frozen-pipe section before you apply heat.
- Check the main valve was not partly closed during other work.
- Private well? Check the breaker for the well pump before anything else.
Usually can wait
Contain it and book a normal visit
- Close the fixture stop valve under the sink or behind the toilet to stop it entirely.
- Put a container under it and check it before bed.
- Schedule a regular-hours repair. After-hours rates rarely make sense for a contained drip.
- Upgrade it to urgent if the drip grows, the valve will not close, or water reaches a ceiling below.
Five situations
The Emergencies This Guide Covers
Each one has its own first move. Hover or tap a panel to open it.
02 / 05
Toilet overflow
The stop valve behind the bowl ends most overflows in seconds. If it is seized, the float in the tank is your backup.
Overflow and backup steps →
03 / 05
Sewer backup
Wastewater rising at the lowest drain points to a blocked main line. Stop running water everywhere in the house and keep clear of it.
Sewer backup steps →
04 / 05
Water heater leak
Close the cold supply, cut the energy source, and watch for hot water. A gas smell changes everything: leave and call from outside.
Water heater steps →
05 / 05
Damage and records
Photos, dates and receipts taken in the first hour are the ones an adjuster asks for later. Take them before cleanup.
Documentation steps →The first fifteen minutes
Five Moves, in This Order
The order matters more than speed. People lose time hunting for a plumber while water is still running, or start mopping before anyone has photographed the damage.
Is it a true emergency?- 01
Stop the water
Close the fixture stop if the problem is at one fixture. Close the main if it is a pipe, a ceiling leak, or you are not sure. Then open a low cold tap to drain the pressure.
- 02
Make it safe
Water and electricity: stay out of standing water near outlets or appliances, and use the breaker only from a dry spot. Gas smell: leave and call from outside. Sewage: gloves, boots, and keep children and pets away.
- 03
Record before you clean
Wide shots of each room, close-ups of the source, a ruler or tape against the water line on walls, and a note of the time. A short video walking through the space is quick and thorough.
- 04
Limit the spread
Move rugs, electronics, papers and furniture out of the wet area. Put foil or plastic under furniture legs. Open windows if the weather allows and get air moving.
- 05
Then call, with questions ready
Once the water is off, the pressure is lower. You can ask about licensing, trip fees and after-hours rates before anyone arrives, instead of after.
Know your valves
Four Shutoffs Worth Finding Today
Most homes have some mix of these. Learn the shape, and you will recognize it with a flashlight at two in the morning.
PLATE A
Gate valve
Round wheel handle. Turn clockwise to close; it takes several turns. Old ones can seize or snap, so use steady hand pressure, not a wrench.
PLATE B
Ball valve
Lever handle. A quarter turn closes it: lever across the pipe is off, lever in line with the pipe is open. Quick and reliable.
PLATE C
Meter or curb stop
Often in a box at the property line or beside the meter. Many need a meter key, and some utilities ask that only they operate it. Check with yours.
PLATE D
Fixture stop
The small oval handle behind a toilet or under a sink. Turn clockwise. It isolates one fixture so the rest of the house keeps water.
Sheet 01 / Common residential shutoffsShapes vary by age and region
Decision matrix
Emergency Now or Morning Call
A fast sort for when you are deciding whether to pay after-hours rates. If you cannot stop the water, it is always the left column.
Get help now
- Water you cannot shut offThe valve is seized, broken, or you cannot find it.
- Sewage at a floor drain, tub or toiletEspecially if several drains are affected at once.
- Water reaching electrics or a ceilingLights, panels, outlets, or a ceiling that is sagging.
- No water in freezing weatherA frozen line can split as it thaws.
- Gas smell anywhereNot plumbing first: leave and call the gas utility or 911.
Usually can wait
- A drip you can stop at a fixture valveClose the stop and book a regular visit.
- One slow drain, others fineStop using that fixture until it is cleared.
- A running toiletWasteful, not dangerous. Close its stop valve overnight.
- Lukewarm water, no leakInconvenient. Check the breaker or pilot per the label.
- Low pressure at one tapOften a clogged aerator you can clean yourself.
Gas smell
Smell Gas? Leave First, Then Call
Natural gas and propane carry an added odorant that many people describe as rotten eggs or sulfur. If you notice it near a water heater, furnace, range or dryer, the house is not the place to troubleshoot.
Your gas utility handles suspected leaks, and its emergency number is on your bill and website. If you cannot reach it, call 911.
- Get everyone outside. Do not stop to gather things.
- Leave switches, phones and lighters alone while you are inside. Any spark is a risk.
- Call from outside, away from the building, and follow the responder's instructions.
- Do not go back in until you are told it is safe.
Before anyone arrives
After-Hours Questions to Ask
Pricing for nights, weekends and holidays varies widely between companies and regions. These questions make it visible before you agree to a visit.
- How does your trip or diagnostic fee work? Ask whether it is charged even if you decline the repair, and whether it is credited toward the work.
- Do after-hours rates apply, and from what time? Some companies switch at a set hour; some charge by the day of the week. Ask for the rule in plain words.
- Will I get the price before work starts? A written or texted estimate you approve is the clean way to do it.
- Can you stabilize it tonight and finish in regular hours? Capping a line tonight and replacing it tomorrow can cost less than a full night repair.
- How are you licensed and insured where I live? Rules vary by state and sometimes by city. Verify the license number with the issuing agency.
Send a Service Request Inquiry
Describe the situation and where you are. The inquiry goes to the site owner by email. It is not monitored around the clock and nobody is dispatched automatically, so stop the water and call locally if it cannot wait.
Open the request formQuick answers
Emergency Plumbing Questions
What counts as a plumbing emergency?
Water you cannot stop, sewage coming up a drain, water reaching electrical fixtures, a leaking water heater, or no water in freezing weather all justify urgent help. A contained drip with a working shutoff valve usually does not.
Where is the main water shutoff valve?
Most often on the wall where the water line enters the house: a basement, crawlspace, utility closet, garage, or beside the water heater. Homes in warm climates sometimes have it outside near the foundation or at the meter box.
Should I call a plumber or the gas company if I smell gas?
Leave the house first, then call your gas utility or 911 from outside. A gas smell is not a plumbing do-it-yourself job, and the utility is the right first call.
Does Plumber 24h send plumbers?
No. Plumber 24h is an independent guide. The service request form sends an inquiry by email; it is not a dispatch line, it is not monitored around the clock, and nobody is sent automatically.
What should I ask before an after-hours plumber comes out?
Ask how the trip or diagnostic fee works, whether after-hours rates apply and from what time, whether a written estimate comes before work starts, and how the plumber is licensed where you live.