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.
- A customer who insists on work inside a gassed house, or on skipping the utility, gets the walk-away: "I will not work on a gas leak until the utility has shut and cleared this meter; call me when they have." Said once, then left.
- The paper: a service and repair form for the search with a stated estimate; a home improvement contract for a repair over $750; the test photographs; the utility's relight ticket in the folder.
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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
- 5Water heaters I: tank. Seismic strapping, the T&P discharge line, expansion tanks, sediment traps, pans, venting, and the garage rules
- 6Water heaters II: tankless and heat pump. Gas sizing, venting, condensate, the 2025 Energy Code direction, and where the gas-ban ordinances stand
- 7Sewer and drain I: the camera, the locator, hydro-jetting vs. cabling, and when each is the right tool
- 8Sewer and drain II: trenchless vs. open trench, whose lateral it is (it varies by city), backwater valves, and point-of-sale lateral ordinances
- 9Case: the hissing line. The meter test, the supply leak that fed the roots, the lateral to the city tap, and the contract and permit trail
- 10Leak detection: slab leaks, acoustic and pressure methods, thermal imaging, and repipe vs. reroute
- 11Low pressure: the PRV, galvanized pipe, and the sequence that finds which one it is
- 12Sewer gas: trap seals, trap primers, vents, and the sequence that finds the smell
- 13Water treatment: where softeners are restricted in California, filtration, pressure regulators, and thermal expansion
- 14Fixtures and conservation: CALGreen flow rates, SB 407 retrofit-on-alteration and disclosure-on-sale, 1.28 gpf, and the ADA basics a plumber needs
- 15Materials and methods: PEX vs. copper vs. CPVC, ABS vs. PVC (it is regional), cast iron, and the transitions that fail
- 16Commercial basics: grease interceptors, the backflow program, and the tester certification that opens a second line of work
- 17Cal/OSHA for a small shop: the IIPP every employer must have, heat illness prevention, trenching and the 5-foot permit, confined space, silica, and ladders
- 18Environmental rules: EPA lead-safe certification for any pre-1978 home, asbestos and transite pipe, and stormwater
- 19Job-site craft: sequencing with the other trades, protecting the home, and the punch list that ends the job
- 20Case: the water heater that failed inspection twice
- 21Case: the gas leak call. The protocol, and the walk-awayYou are here
- 22Case: the "customer doesn't want a permit" job
- 23Template: the job-site checklist, from the truck to the walk-through
- 24Template: the pre-inspection checklist by stage. Underground, rough, water heater final, gas, and trim
- 25Template: the Injury and Illness Prevention Program starter for a plumbing shop of one to five
- 26Template: the Heat Illness Prevention Plan for a plumbing shop, outdoor and indoor
- 27Template: the customer options sheet (good / better / best) with the cost band, the permit path, and the code trail on each rung