In the Field · Part 4
Case: the gas leak call. The protocol, and the walk-away
A homeowner smells gas near the water heater and calls a plumber instead of the utility. The plumber's first job is not diagnosis; it is the protocol that keeps everyone alive: out of the house, no switches, no phones inside, the utility from outside, the meter shut only if it is safe to reach, and no work until the utility has cleared the meter. Then the method: isolate at the meter and the appliances, the manometer, the soap test, the 10 psi test on the isolated section, the repair, the test again, and the relight by the utility. The case also shows the walk-away: the customer who wants the plumber to "just fix it now" with the house still gassed up, and the one sentence that ends that conversation.
What the full lesson covers
- The protocol before the method: everyone out, doors open on the way, no switches, no phones or ignition inside, the utility's emergency line called from outside, the meter valve shut only if it is reachable without re-entering a gassed space, and nobody back in until the utility says so.
- The utility owns the meter and the service and controls the relight; the plumber's work is the house piping on the customer's side, after the utility has shut and cleared.
- Find the leak with a manometer and a soap solution or a combustible gas detector, never a flame; confirm the repair with the code's 10 psi, 15-minute test on the isolated section (CPC 1213.3); document the gauge.
Unlock the full lesson
This is the public summary. The full lesson has the method, the worked cases, the checklists and the templates:
- All in-depth lessons, exam prep and After the License
- 1,200+ practice questions
- AI tutor (100 messages included)
- 18+ hours of audio lessons
- Full-length practice exams
- Pass guarantee
More lessons in The Field: Method, Code, and Cases
- 1The diagnostic method: verify, isolate, cheapest test first, cause not symptom, the options ladder, document
- 2Permits: when one is required, what is exempt, pulling it online, the inspection sequence, what inspectors look for, and handling corrections
- 3Daily-use code: drainage slope, venting, water sizing, cleanouts, trap arms, and fixture units, with the section for each
- 4Gas piping in practice: sizing, CSST bonding, the pressure test, appliance connectors and shutoffs, sediment traps, and seismic shutoff valves