Bring these

• Flashlight
• Tape measure
• Durable valve tags and label printer
• Phone or camera

1. 1Collect existing recordsGather plumbing drawings, renovation notes and emergency contacts. Treat old drawings as a starting point rather than proof that the piping is unchanged.
2. 2Walk with someone who knows the systemHave authorized staff or a plumber identify accessible domestic isolation points. Photograph each valve and enough surroundings to locate it later.
3. 3Record useful detailsList valve ID, floor/room, service, fixtures affected, access requirements and the source of the identification. Mark uncertain entries unverified rather than guessing.
4. 4Label and reviewUse durable tags placed so they do not hide operating instructions or inspection labels. Keep access unobstructed; do not attach tags to sprinkler heads or moving parts.
5. 5Validate during planned workConfirm isolation boundaries only during an approved outage with affected users notified. After work, verify restoration and update the map at the maintenance desk.

Record the exact location, observed condition, time, actions taken, person contacted and follow-up owner. Keep unresolved items visible. A completed checklist means the check was performed; it does not automatically mean the equipment passed or is safe.