What to do before the plumber arrives: an emergency checklist

A burst pipe or an overflowing drain does not wait for business hours, and the first ten minutes before help arrives often decide how much damage you are cleaning up afterward. This checklist covers what actually helps, without asking you to do anything a plumber should handle instead. See our directory of Columbia-area plumbers if you have not already found one to call.

Step 1: stop the water

Shutting off the water is the single most useful thing you can do. Every home has a main shutoff valve, and most fixtures also have individual shutoff valves under sinks and behind toilets. If the leak is isolated to one fixture, closing that valve alone may be enough. If water is spreading or you cannot find the source, shut off the main.

Turn the valve clockwise until it stops. If it will not budge, do not force it hard enough to risk breaking it, since that turns one problem into two.

Step 2: address electrical risk

Water and electricity are a genuinely dangerous combination. If water is pooling anywhere near outlets, appliances, or your electrical panel, and you can reach the breaker without walking through standing water, switch off power to that area. If you cannot reach it safely, leave it and wait for help.

Step 3: contain and protect

Once the water is off or slowed, move what you can. Towels, buckets, and a wet vacuum if you have one can limit how far water spreads into flooring, carpet, or drywall. Move furniture and valuables out of the immediate area. Do not spend so much time on this that you delay calling for help.

Situation	First action	Then
Burst or leaking pipe	Shut off main water valve	Contain water, call a plumber
Overflowing toilet	Shut off toilet’s supply valve	Stop using that bathroom
No hot water / no water at all	Check main valve is open	Call a plumber to diagnose
Sewage backup	Avoid the area, do not run water	Call a plumber immediately
Smell of gas near a water heater	Leave the area, do not flip switches	Call your gas utility and a licensed plumber from outside

Step 4: call for help and describe the problem clearly

When you call, be specific: what is leaking or backing up, whether you have already shut off the water, and how long it has been happening. A plumber triaging multiple calls will prioritize based on what you tell them, so a clear description helps you get seen faster if the problem is genuinely urgent. See our methodology for how we score plumbers on response speed and follow-through, which matters most in exactly this kind of situation.

What not to do

Do not pour chemical drain cleaner into a backed-up drain hoping to fix it before the plumber arrives; it rarely works on a serious clog and can make the eventual repair more hazardous for whoever handles it. Do not attempt to cut, weld, or force open pipe fittings yourself. And do not ignore a gas smell near any plumbing fixture: leave the area and call your gas utility along with a licensed plumber. This is general safety information, not a substitute for professional judgment on the scene.

After the immediate danger passes

Once the water is off and the area is contained, take a few photos of the damage for your records, in case you need them for an insurance claim. Note the time the problem started and what you observed, since a plumber will ask. From there, it becomes a scheduling question rather than an emergency, unless the source of the problem is still active. If a hard freeze caused the burst, the guide to winterizing pipes covers how to keep it from happening again. Browse emergency plumbers in the Columbia area once you are ready to get someone on site.

Bottom line

The goal in the first few minutes of a plumbing emergency is simple: stop the water, protect against electrical risk, limit the spread of damage, and get a clear call in to a plumber. Everything past that point is their job, not yours.