Meter Union Leak and a Customer Who Refuses Shutdown
On a routine service call for a kitchen range, the technician smells gas at the meter set outside a duplex. A soap bubble test at the union downstream of the meter shows a growing bubble. The meter outlet pressure is 7 in. w.c.; the house has a furnace, water heater, and range with standing pilots. The customer says the smell started after the utility changed the meter and refuses to let the technician shut off the gas because it is -5°C and the tenants need heat. The technician's combustible-gas detector reads 10% LEL at the union and 2% LEL at the basement stair. The utility emergency line has a 45-minute wait. The technician carries a shutoff wrench, tags, and a manometer.
1. What immediate actions are required, and how would you handle the customer's refusal?
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Treat this as an emergency. Natural gas has a lower explosive limit of about 5% by volume, so 10% LEL is roughly 0.5% gas and can rise quickly in an enclosed area. Do not operate switches, thermostats, phones, or doorbells near the leak. Shut off the gas at the meter or service valve, ventilate if it is safe to do so, and evacuate or keep occupants away from the area. Call the gas utility and, if the odor or reading is increasing, the fire department. The customer's refusal does not override an imminent danger: explain the risk, shut off anyway, tag the meter, and contact a supervisor or emergency responder if access is refused. Do not relight pilots or restore gas until the leak is repaired and the system is tested.
2. After the union is repaired, what tests and steps are required before relighting the appliances?
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Confirm who owns the union and meter set; a leak on utility-owned equipment may require the utility to make the repair. After repair, isolate the house piping and pressure-test it at 1.5 times maximum working pressure but not less than 5 psi, hold for the required period, and check for zero drop. Then soap-test every joint at operating pressure, purge the lines, and check appliance regulators and manifold pressures. Relight each standing pilot according to the manufacturer's instructions, verify flame characteristics, check draft and spillage at naturally vented appliances, and measure CO where combustion is possible. Leak-test the final connections with an electronic detector or soap solution and document the results.
3. Which parties must be notified, and what documentation is needed?
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Notify the gas utility for the meter-set leak and follow Ontario/TSSA and municipal incident-reporting requirements for a gas leak or emergency shutdown. Notify the fire department if evacuation or a hazardous atmosphere is involved, and inform the building owner in writing. Document the time, location, detector readings, soap-test result, pressure readings, the customer's refusal and witnesses, the shutdown, the repair, the test pressures and durations, and the relight checks. Keep the tag on the meter or valve and record who authorized the work. Clear, factual records protect the technician and help the utility and regulator understand what happened.