Emergency Plumbing: What to Do Before the Plumber Arrives
A plumbing emergency doesn’t announce itself. One moment everything is fine; the next, water is pouring from under a sink, a toilet won’t stop overflowing, or a pipe has burst in the wall. What you do in the first few minutes determines whether you’re dealing with a minor repair or tens of thousands of dollars in water damage.
This guide walks you through the right response for the most common plumbing emergencies — what to shut off, what to move, and what not to touch until a licensed plumber arrives.
Step One: Don’t Panic. Do This First.
Before anything else:
Locate your main water shutoff valve. If you don’t know where it is right now, stop reading and find it. In most homes it’s:
- Near the water meter (often in the basement, crawl space, or utility closet)
- Outside near the foundation
- In a garage or mechanical room
Turn it clockwise to shut off all water to the house. This is your emergency brake for any plumbing disaster. Practice finding it before you need it.
Common Plumbing Emergencies: What to Do
Burst Pipe
Immediate actions:
- Shut off the main water supply immediately
- Turn on cold water faucets to drain remaining pressure from the pipes
- Shut off the water heater to prevent damage from an empty tank
- If water is near electrical panels, outlets, or appliances — do not enter until power is off at the breaker
- Move electronics, furniture, and valuables out of the affected area
- Place buckets and towels to contain water flow
- Take photos and video for insurance documentation
What not to do: Don’t attempt to patch a burst pipe with tape or sealant — it’s a temporary fix at best and can mask ongoing damage. Call a licensed plumber immediately.
Overflowing Toilet
Immediate actions:
- Lift the tank lid and push down the flapper (the rubber seal at the bottom of the tank) to stop water flow
- Turn the shutoff valve behind the toilet clockwise until water stops
- Don’t flush again — ever, until the clog is cleared
- Use a plunger with a flange (the cup inside the cup) — standard plungers work on sinks, not toilets
- Plunge with firm, controlled strokes — not frantic ones
When to call a plumber:
- The toilet won’t flush after repeated plunging
- Multiple drains in the house are slow simultaneously (sign of main line blockage)
- You can hear gurgling from other drains when the toilet is used
Water Heater Leak
Immediate actions:
- Turn off the cold water supply to the water heater (shutoff valve at the top)
- For gas heaters: turn the thermostat to “pilot” — don’t shut off the gas line unless you smell gas strongly
- For electric heaters: shut off the circuit breaker for the water heater
- Connect a garden hose to the drain valve and direct it to a floor drain or outside
- Open a hot water faucet somewhere in the house to allow the tank to drain
Never ignore a water heater leak. Small leaks precede complete tank failures — which can release 40–80 gallons of water into your home.
Slow or Clogged Drain
This is not a plumbing emergency, but it becomes one if ignored.
What to try:
- Remove and clean the drain stopper
- Use a plunger
- Use a drain snake (available at hardware stores for $20–$40)
What not to do:
- Don’t pour chemical drain cleaners down repeatedly — they corrode pipes and rarely clear serious clogs
- Don’t ignore recurring clogs in the same drain — they signal a deeper issue
Gas Leak (Plumbing-Adjacent)
If you smell rotten eggs or sulfur:
- Do not flip any light switches or use any electrical devices
- Leave the house immediately — leave doors open
- Call your gas utility’s emergency line from outside or from a neighbor’s phone
- Do not re-enter until cleared by the utility company
This is not a job for a plumber until the gas company has secured the leak.
How to Minimize Damage While Waiting for the Plumber
Document everything. Take photos and video of all water damage before cleanup. Your insurance company will need this.
Start drying immediately. Water damage escalates quickly. Use towels, mops, and fans to remove standing water. If water has soaked into drywall or subfloor, mold can begin growing within 24–48 hours.
Shut off electricity if needed. Water and electricity are a lethal combination. If water has reached electrical outlets, wiring, or appliances, shut off the breaker for that area before entering.
Save the damaged parts. Don’t throw away failed fittings or pipe sections until your plumber has seen them — they may need to diagnose the failure cause.
What to Tell the Plumber When You Call
Have this information ready:
- What happened and when
- Where the problem is located (which room, which fixture)
- Whether you’ve shut off the water
- Whether there’s water near electrical components
- Approximate age of your home and plumbing (copper, galvanized, or PEX)
The more the plumber knows before arriving, the faster they can diagnose and fix the problem.
When Is It a True Emergency?
Call a plumber immediately (not “sometime today”) if:
- Water is actively flooding a room
- A pipe has visibly burst
- You have no water to the entire house
- Sewage is backing up into drains or the yard
- Water is near electrical panels or outlets
Most plumbing companies offer 24/7 emergency services for situations like these — and they’re worth the premium compared to the cost of extended water damage.
Get a Pro to Your Door Fast
When a plumbing emergency strikes, the last thing you want to do is spend 20 minutes searching for a reliable plumber. ProCraft Local connects you with licensed, vetted plumbing contractors in your area — ready for both emergencies and scheduled repairs.
Request a Free Quote or Emergency Service →
Your home’s plumbing is a system. A failure in one part stresses everything else. The right response in the first few minutes isn’t just about stopping the immediate leak — it’s about preventing the $15,000 remediation bill that comes when water damage is left to spread.
Know your shutoffs. Act fast. Call a pro.