1. Leave the house — bring everyone with you
Take family, pets, and a phone. Do not stop to pack. Mercaptan-odorized natural gas at concentrations between 5% and 15% in air is explosive. Move to a neighbor's property or the sidewalk.
The mercaptan rotten-egg odor near the basement water heater. The pilot that won't relight. The hissing behind the kitchen range. Natural gas leaks are not negotiable — leave the house, call from outside, and Rushplumb dispatches a Massachusetts master plumber with Bacharach CGI gas sniffer, pressure-test equipment, and the National Grid coordination to shut the line, find the leak, repair it, and relight to MA Fuel Gas Code.
Take family, pets, and a phone. Do not stop to pack. Mercaptan-odorized natural gas at concentrations between 5% and 15% in air is explosive. Move to a neighbor's property or the sidewalk.
No matches. No lighters. No candles. Do not flip light switches on or off — the spark inside a switch is enough to ignite gas at concentration. Don't start a car in an attached garage. Don't use a phone inside the house.
National Grid's Massachusetts emergency line is 1-800-233-5325 — they prioritize gas-odor calls and dispatch their utility crew to shut off the service at the meter. Then call Rushplumb at (888) 616-9423 for the inside-the-house repair after the utility shut-off is complete.
Wait for the National Grid responder or fire department to clear the building. The plumber works the repair after gas service has been shut off at the meter and the building has been ventilated and tested clear.
Bacharach Leakator or TIF combustible gas indicator sweeps fittings, joints, and appliance connections. Detection sensitivity to 20 ppm methane. Locate the source within inches.
Close the affected branch at the manifold. Apply 10 psi nitrogen and read pressure decay against the static specification. Holds with no drop confirms repair scope is complete.
Black iron pipe or CSST (corrugated stainless steel tubing) per 248 CMR 5.00. Pipe dope or PTFE tape rated for gas; no Teflon thread tape on flare fittings. Lead-free brass for transitions.
City of Brockton building department gas permit pulled for the work. Inspection scheduled. National Grid coordinated for utility-side relight at the meter and appliance pilot ignition.
Gas water heater pilot, thermocouple, gas valve — many "no hot water" calls trace to gas-side issues at the appliance.
Water heater service →Real dispatcher 24/7 for gas, water, sewer emergencies. Ring three pickup, MA Master Licensed plumber routed inside the hour.
24/7 hub →Full Rushplumb service catalog — 26 services across emergency, same-day, and scheduled scopes.
Browse all →Natural gas itself is odorless. Utilities add mercaptan — a sulfur compound that smells like rotten eggs or skunk — at concentrations safely detectable well below explosive levels. The smell is sharp and unmistakable. If you smell it, treat it as real even if you cannot find the source.
National Grid serves Brockton and most of Plymouth County for natural gas distribution. Emergency line: 1-800-233-5325. They handle the public main, service line to the meter, and the meter itself. From the meter into the house — including the gas piping to your stove, water heater, dryer, and furnace — is the homeowner's responsibility and our scope.
Massachusetts Fuel Gas Code (248 CMR 5.00) permits Schedule 40 black iron pipe, CSST (corrugated stainless steel tubing — TracPipe, Gastite, Wardflex are common brands), and copper for limited specific applications outside Massachusetts (copper is not generally allowed for gas in MA due to sulfur reaction risk). Joining materials and sealants must be rated for gas service.
Yes. All gas-line work in Brockton requires a plumbing permit through the Building Department and final inspection. Only Massachusetts-licensed master plumbers (or gas fitters with the appropriate gas endorsement) can perform gas-line work. The permit record is left with the homeowner at completion and required for homeowner's insurance to recognize the work.
No. Any detectable gas leak is a code violation, an immediate explosion hazard, a carbon monoxide risk if combustion appliances are involved, and a continuous cost on your monthly bill. Small leaks become large leaks. We do not "monitor" leaks — we find them and repair them on the same visit.
Most single-leak fitting or joint repairs are completed inside two hours from arrival — locate, isolate, repair, pressure-test, pull permit, schedule inspection. Whole-house repipe scopes for end-of-life black iron run multiple visits across a few days, phased to keep gas service to at least the water heater during the work.
Bacharach CGI sniff-test, pressure isolation, repair to Massachusetts Fuel Gas Code, National Grid coordinated. 30 to 60 minute response across all five Brockton ZIPs.