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Gas Line Repair in Black Diamond, WA
In Black Diamond the mains connection is the norm at 68% of households, with 1% on tank propane. Knowing which you have is the first step and it takes one look at the wall.
Read this first
The utility's regulated line ends at the meter outlet and the piping beyond it belongs to the property owner. That boundary decides most gas line questions in Black Diamond, where 68% of households heat with utility gas and a buried service line runs from the street on most properties.
Source: US Census Bureau, American Community Survey table B25040; the service line boundary is 49 CFR § 192.3.
If you smell gas right now
Leave the building on foot. Do not use a phone or a light switch inside. Call 911 and your gas utility from somewhere else, and do not call us — we are a referral service, not an emergency line. The full list, in order.
How Black Diamond is supplied
Everything upstream of the meter outlet is the operator’s service line under 49 CFR § 192.3. Everything after it is customer piping under local code. That single point is what a contractor establishes before quoting.
It is also why the answer to "is this my problem" is sometimes no, and why it is worth asking before assuming it is yes.
| Households in Black Diamond | Share |
|---|---|
| Utility (mains) gas | 68% |
| Bottled or tank propane | 1% |
| Electricity | 26% |
| Fuel oil and kerosene | 1% |
| Wood and everything else | 3% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. Universe: 2,425 occupied housing units. What B25040 measures is the heating fuel, not the connection. It is the closest published proxy for whether there is a buried service line here, and it is a proxy. Service line definition: 49 CFR § 192.3, via PHMSA interpretation PI-12-0003.
Across Washington as a whole, 39% of households are on mains gas and 2% on tank propane. Black Diamond sits 29 points above the state on mains and about level with it on propane. Averages are where this kind of difference disappears. The figures on this page are the town’s own for that reason.
Before anyone digs on the property
A locate before digging is free, and PHMSA is unambiguous about the value — excavation damage is the leading cause of pipeline incidents and calling 8-1-1 first avoids one 99 times in a hundred. The gap to ask about is private buried line, which a standard locate may not mark.
Source: PHMSA, 811 Day.
What to ask whoever quotes it
If any part of the job is in the ground, ask when they are calling 8-1-1 and whether a private line may be in the way. Both answers should come before the excavation, not during it.
Other Washington towns we route in
- Edmonds 52% mains gas · 1% tank propane
- Yacolt 1% mains gas · 2% tank propane
- Washougal 34% mains gas · 4% tank propane
- Freeland 3% mains gas · 30% tank propane
- Friday Harbor 2% mains gas · 18% tank propane
Checking a plumber in Washington
Washington licenses are issued by the Washington State Department of Labor and Industries, which publishes a public search you can use before work begins.
Gas work is separately permitted and separately licensed in most jurisdictions, so ask specifically about gas rather than plumbing in general.
For repair work, not for a suspected leak.If you can smell gas, leave and call 911 or your utility from outside; this is the wrong number for that. For everything else — a line, a meter, an appliance connection — we will route you to a contractor covering your area, free of charge to you. Any Black Diamond job, gas or otherwise, is routed from here.
Call (888) 752-8038