Emergency Plumbing Checklist for Homeowners
Everything on this list takes one calm afternoon and it is the difference between a manageable incident and an expensive one. The most valuable item is knowing where your main shutoff is and that it actually turns.
What to do right now
Do these first. None of them need tools or plumbing knowledge, and they limit what this ends up costing you.
- Find the main shutoff and test itLocate it, close it fully, open it fully, and check nothing weeps afterwards. If it will not turn, get it replaced now rather than discovering it during a flood.
- Label it and tell everyoneA tag on the valve and a photo on your phone. A shutoff only one person can find is nearly useless.
- Find your exterior cleanoutA capped pipe standing a few inches above ground between the house and the street. Knowing where it is saves real time on a sewer call.
- Check every fixture valve turnsBehind each toilet, under each basin. These seize just as readily as the main and they are what let you isolate one fixture without shutting the house down.
Does this need a plumber tonight?
- An active problem right now rather than preparation
- All preventative work, which is the point of this page
What to own
A flange plunger, a plastic drain zip tool, a bucket, towels, a torch, and a pressure gauge that screws onto an outside tap. Under fifty dollars for the lot.
A flange plunger, meaning the type with a soft extension that fits into a toilet outlet, is genuinely different from the flat cup sort and it is the one that works on a toilet. Most households own the wrong one.
The pressure gauge is the underrated item. It tells you in seconds whether high supply pressure is quietly destroying your fittings and appliances, which is a problem most homeowners never diagnose.
- A flange plunger for toilets and a cup plunger for sinks
- A plastic drain zip tool for hair
- A pressure gauge for an outside tap
- A torch that lives near the shutoff
- A bucket and old towels
- Two or three repair clamps sized to your pipe
What to write down
The location of the main shutoff and the cleanout, the age of the house, the pipe material, the age of the water heater, and your water utility's emergency number.
Keep it somewhere findable at three in the morning, which for most people means a photo on a phone rather than a note in a drawer.
The pipe material and the age of the house are the two facts that most narrow a diagnosis over the phone. Being able to say the house is from 1952 and the supply is galvanised changes the conversation immediately.
Seasonal, before the first freeze
Disconnect every hose, close crawlspace vents, and check that anything in an unheated space is insulated.
In Northern Utah this is genuinely routine maintenance rather than an optional precaution, and it prevents the largest single category of winter call we attend.
Questions people ask about this
How often should I test the main shutoff?
Twice a year. Closing and opening it fully keeps it free, and the whole exercise takes two minutes.
Is a water alarm worth it?
For a water heater in a garage or attic, or any appliance in a space nobody visits daily, yes. They are inexpensive and the failures they catch are the expensive kind.
What is the single most useful thing on this list?
Knowing where the main shutoff is and that it turns. Everything else is secondary to being able to stop the water.
If that is not quite what you have
Not sure how urgent this is?
Describe what you can see and hear. We will tell you whether it needs someone tonight, and what to do in the meantime either way.
Or send it over
Four things and a photo.