Plumber homeowner tool

Plumbing Emergency Shutoff Checklist

Sort leaks, flooding, shutoff access, sewer backup, and electrical warning signs into safer next steps before calling a plumber. The tool does not diagnose the leak; it prepares a clear handoff.

Last updated Jul 11, 2026.

Plumbing safety triage

Build your shutoff checklist

What is happening?

Where is the issue?

Water is spreading nowActive flooding should move the call sooner.Shutoff is reachableOnly operate a valve you can reach safely.Water near electricalStay out of wet electrical areas.Condo, strata, or rentalBuilding contacts may need to be notified.

Recommended next step

Contain, document, and book

The issue may be containable, but it still needs direct confirmation. Shut off the affected fixture where safe, document the issue, and book a plumber.

Priority

Book

Checklist

0/4

Shutoff target

Use the local fixture shutoff under the sink, behind the toilet, or at the fixture if accessible.

Immediate actions

Keep people out of wet, slippery, or contaminated areas.Use the local fixture shutoff under the sink, behind the toilet, or at the fixture if accessible.Move valuables only if you can do it without stepping into unsafe water.Call a plumber and describe the visible source, affected fixtures, and shutoff status.

Do not do

Do not open walls, disturb mould, or remove contaminated material without proper restoration advice.
Do not force a stuck shutoff valve; a broken valve can make the leak worse.
Do not use electrical equipment, extension cords, or switches in wet areas.

Document

Take photos and short videos from a safe, dry location.
Note the time you discovered the leak and what valves were shut off.
Keep damaged parts, invoices, and plumber notes until the issue is resolved.

Questions for the plumber

What should stay shut off until you arrive?
How are emergency call-out, diagnostic, parts, and after-hours fees billed?
What access, drywall, flooring, or restoration work is outside the plumbing repair?
Can you document the suspected source and repair for insurance or property records?

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What should homeowners do during a plumbing leak?

The first decision is safety, not diagnosis. Keep people away from slipping hazards, contaminated water, and wet electrical areas. If it is safe, isolate the fixture or appliance, then use the main water shutoff if water is spreading or the source is unclear.

For sewer backup, suspected water main issues, gas smells, or a valve you cannot safely operate, stop and call the right help instead of forcing cleanup. A short record of photos, valve timing, and visible symptoms makes the plumber conversation cleaner.

Shutoff decisions this checklist covers

Good emergency notes distinguish between a containable fixture leak, a whole-home water problem, and a hazard that should stop homeowner cleanup.

Fixture or appliance first

Small leaks may have a local shutoff under the fixture, behind a toilet, at the appliance, or at a nearby supply valve. Use only valves you can reach safely.

Main water if unclear

If water is spreading and the source is not isolated, the main water shutoff is usually the safer homeowner target until a plumber can inspect.

Stop around electrical hazards

Water near electrical equipment changes the priority. Stay out of wet areas and call emergency help if there is shock, smoke, fire, or arcing.

Document before cleanup

Photos, videos, valve timing, and plumber notes help with insurance, landlord, strata, and repair records when it is safe to collect them.

Plumbing emergency FAQ

What should I do first during a plumbing leak?

Move people away from slipping, contaminated water, or electrical hazards. If it is safe, shut off the fixture valve, appliance valve, branch valve, or main water shutoff, then call a plumber for active leaks or flooding.

Where is the main water shutoff usually located?

Many homes have a main water shutoff near the water meter or where the water service enters the home. If you cannot find or safely operate it, contact your water utility or a plumber rather than forcing the valve.

When should I treat a plumbing leak as urgent?

Treat active flooding, water near electrical equipment, sewer backup, a burst pipe, a leaking water heater, or a leak you cannot isolate as urgent. Stop using affected fixtures and call for help.

Can this checklist diagnose the leak?

No. It helps you choose conservative shutoff and documentation steps before a plumber arrives. It does not replace professional diagnosis, restoration advice, or utility instructions.