Gas installation service in Orange County: lines, leaks, and earthquake valves

What gas installation service covers

Here is the plain version, the way I describe it on the phone. Gas installation service covers your home’s gas lines here in Orange County, everything from the gas meter to the appliances that burn gas. The gas company owns the line up to the meter. Past the meter, on your side, the whole system is ours to install, repair, move, or replace.

That covers the lines in the walls and the attic, the lines buried in the yard, the shut-off valves, the earthquake valve at the meter, and the final connection to each appliance: the furnace, the water heater, the range, the dryer, the pool heater, and the fire pit out back. We find and repair leaks, run new lines, move or remove lines for a remodel, and pressure-test systems to prove they are tight. If it is natural gas and it sits on your side of the meter, we handle it.

A couple of gas jobs live on other pages because they belong there. The gas connection on a new water heater is part of that install, and commercial gas systems run through our commercial work. Everything else under gas installation service, for a house in Orange County, lands here.

The gas line in your home, from the meter to the appliance

Most homeowners never think about the gas line until something goes wrong, so here is the quick map. The gas company’s line ends at your meter, usually near the street or on the side of the house. From there, the gas runs at low pressure to each appliance. Inside the house and above ground, that pipe is almost always threaded steel, what the trade calls black iron. Buried in the yard, it is yellow polyethylene, a plastic made for gas, run with a tracer wire so the line can be found again later. Each appliance has a shut-off valve, and many homes now have an earthquake valve at the meter that closes the whole house off if the ground shakes hard enough.

One thing is worth knowing, because it is the thing that saves lives. Natural gas has no smell of its own. The gas company adds a chemical called mercaptan to give it that sharp rotten-egg odor, and they have done so since the 1930s. Your nose can catch it at a tiny concentration, long before the gas reaches a dangerous level in the room. That smell is not a nuisance. It is the warning system doing its job.

The gas calls we run most in Orange County

If you want to know what a gas plumber in Orange County does in a typical week, most of it is leaks. A lot of those leaks are on the underground line between a meter that sits out in the yard and the building it feeds. You see that setup most in older condo and apartment communities, where it was cheaper to bring one line in underground than to bring every meter up above ground the way newer construction has to.

After leaks, the steady work is gas lines for tankless water heaters. A tankless unit burns far more gas at once than the old tank it replaces, so it usually needs its own larger line run from the meter. Then come remodels, where a water heater or a dryer is being moved or added and the gas line has to move with it. We install drip legs and fresh shut-off valves on those jobs as a matter of course.

There is also a particular Orange County one, fire rings. On a lot of older installs, the burner ring was mounted with the holes facing up instead of down. Water collected inside the ring, sat there, and rotted it out from the inside. And then there is the call that has taken off lately, earthquake valves, which gets its own section below, because what is driving the demand is not earthquakes. It is insurance.

Gas leaks: how we find them and how we fix them

Let me clear up the biggest myth first. Unless you have a major leak, you are not going to hear a hiss. The pressure in a home gas line is too low for that. What you will notice is the smell, that rotten-egg odor everybody knows. There is one other tell most people have never heard of.

How we find and repair the leak

When we arrive, the method depends on the size and location of the leak. For a small leak at a fitting or an appliance, the old soap test still works: brush soapy water on the joint and watch for bubbles. We also carry electronic sniffers that detect gas in the air. For a leak we cannot see, we run a pressure test, and that part takes time. Code does not let us test against a shut-off valve, and the small appliance valves cannot hold the pressure we test at, so we have to cap off each line individually.

Underground leaks are more of a headache than the ones you can see. Locating the leak is rarely the problem. The pipe itself is. Underground line is often old steel, and once steel has rusted through in one spot, it is usually weak along the whole run. A single patch rarely holds, so the real fix is replacing the line in polyethylene with the right transition fittings on each end. With old steel underground, the cost is in the digging, so replacing the run beats chasing one rotten joint after another.

When the gas company shuts the gas off

One more thing every homeowner should understand, and it has to do with the gas company. Southern California Gas Company can shut your gas off for any detectable leak. Once they do, they will not turn it back on until the whole system is proven tight. They run a pressure test so sensitive that the smallest leak sets it off, and service does not come back until we have tested and fixed the entire system and they have tested it again behind us. So if you smell gas strongly, call the gas company. They do not always shut you down, but they can, and that is the price of being safe. The one thing you should never do is ignore the smell.

Earthquake gas shut-off valves

This is the fastest-growing gas call we run, and the reason is not earthquakes. It is insurance. An earthquake gas shut-off valve, also called a seismic shut-off valve, mounts on the outlet side of your gas meter. Inside is a simple mechanism, usually a steel ball balanced on a seat, that drops and closes the line when the ground shakes hard enough. It is built to ignore the everyday stuff, a heavy truck or a slamming door, and to trip only on real seismic motion, roughly a 5.1 to 5.4 on the Richter scale or stronger, according to the Building America Solution Center. When it trips, it shuts off the gas leaving the meter. It protects your home only, not the gas company’s side of the system.

Why insurers are driving the demand

In California, these valves are certified to a standard called ANSI/ASCE 25 and approved by the state’s Division of the State Architect before they can be installed. New construction requires them, and more Orange County cities adopt the requirement every year. A significant remodel that opens up the gas system usually triggers it too. On an existing home the valve is recommended rather than required by code, but that is where the insurance companies have stepped in. More and more homeowners are being told they need one before a carrier will write or renew a policy, and home inspectors are increasingly flagging the lack of one during a sale.

Resetting the valve, and the install itself

Two things homeowners get wrong about these valves. First, the valve is not a single-use part. After it trips, you usually reset it with a screwdriver, right there at the meter. Second, the install is not always pretty. When there is not enough room at the meter, we have to loop the pipe around to fit the valve in. We make it look as clean as we can and paint everything when we are done so it blends in, but tight quarters are tight quarters.

One note on who can do the work. On a commercial building, gas work has to be done by a licensed contractor, which we are. On a home, the rules vary city to city, and in most places a homeowner is allowed to work on their own house. Still, since it is usually an insurer or an inspector asking for the valve, most people hand the job to a licensed plumber and move on.

What you can safely do, and what to leave alone

I believe most homeowners are mechanically capable, and I am not going to pretend otherwise. The honest reason to leave gas work to a licensed plumber is not that you could not learn it. It is the stakes, the tools, and the law. An untested line that leaks can cause a fire or an explosion, so if you ever touch a gas line, it has to be tested before it goes back into service. The specialized tools run into the thousands of dollars, and most suppliers will not rent them out because of the liability. And California law requires a licensed C-36 contractor and a permit for gas line and gas appliance work, regardless of the size of the job. That is the state’s rule, not ours.

Here is the short list of what a homeowner can safely handle around gas:

• Keep a gas shut-off wrench at your meter, so you can turn the gas off fast in an earthquake or any other emergency.
• Turn off the shut-off valve behind or beside an individual appliance, such as the one behind the stove, when you need to.
• Reset a tripped earthquake valve with a screwdriver at the meter. It is not a single-use part.
• If you smell gas, leave and call the gas company. That is the whole job. Do not go looking for the leak yourself.

What to leave to a plumber

One I will not warn you off is the gas flex, the flexible connector at an appliance. Someone mechanically capable can change one. The thing is, a gas flex rarely needs replacing unless it gets damaged, so most homeowners never have to touch it. What I would leave alone is anything that means moving or rerouting a line, running a new line to a barbecue or a pool heater, or reusing an old flex. We never reuse an old gas flex; for the price of a new one, it is not worth the risk. And a pool heater has to be plumbed in steel, never a flex, because it burns too many BTUs for anything but a solid connection.

Permits, code, and Orange County city differences

Any time a gas line is moved or the gas system is opened up, the work is supposed to be permitted. How the permit gets handled is where Orange County cities differ. Some take the application online, others want it in person.

The code difference we run into most is on underground replacement. Buried gas line has to be deep enough to stay protected. Under the 2022 California Plumbing Code, plastic PE gas pipe needs at least 18 inches of cover plus a tracer wire so it can be located. There is a provision that lets a hardscape like a concrete walkway count toward that cover, since the concrete adds protection of its own. We do not play that game with an inspector. Instead we dig the whole trench to about 24 inches, deeper than the minimum, so there is never a question about whether a few inches of concrete makes up the difference. That way the job defaults to the worst case and keep it 100 percent to code.

On pricing, gas work follows the same approach as the rest of what we do. If we can come out and see the problem without pulling tools off the truck, the look is free. The moment a job needs a pressure test or a leak locate to diagnose, that is billable work, and you get a written price for it before we start. Most of the time we can quote the repair on sight, because we can see what is wrong. Either way, the price is in writing before any work begins.

Real Orange County gas jobs

A few recent jobs, with the identifying details left out.

An Anaheim apartment complex: 55 feet to the laundry room

We arrived at an Anaheim apartment complex to find the gas meter red-tagged and locked out. That meter fed the building’s laundry room, and the leak was in the underground run between the two. We dug 55 feet from the meter to the sidewalk, jackhammered an opening and tunneled both directions beneath it, then dug another stretch on the far side where the line came up into the laundry room. We ran a new 1-inch PE gas line the whole way, added a new shut-off at the meter, and pressure-tested it for 15 minutes with no leaks. Then we backfilled, groomed the area, and primed and painted the above-ground pipe against rust. Management called the gas company back out to restore service.

A Huntington Beach apartment complex: a building back on gas in one day

A Huntington Beach apartment complex had the gas shut off to an entire building. We repressurized the line to find the leak and found it in several places at once: both ends of the risers were leaking at soil level, and the shut-off valves on either end were leaking too. The fix meant trenching out a 10-foot section of underground pipe and replacing both risers and both valves. Management needed the building back on gas the same day, so we brought in two more plumbers, pulled the bad section, plumbed in the repair, tested for leaks, and had the whole building back on gas before the day was out.

A golf course in Orange County: 350 feet and a fusion machine

The gas company red-tagged the line at a golf course in Orange County, where 350 feet of 3-inch gas line ran underground to the buildings and the pro shop. We capped the line and filled it with air, and it would not hold pressure. Digging down by the restrooms, we found a rotten riser and, behind it, 3-inch PE plastic line. We cut out the old section, used a butt-fusion machine to weld in new 2-inch PE, set a new meter riser, and tied it back into the building line. The gas company came out, leak-tested it, found it clean, and turned the gas back on. We backfilled and compacted everything behind us.

A church property in Huntington Beach: the leak under the tree

At a church property in Huntington Beach, you could smell gas in front of the youth center. We traced the strongest concentration to the ground between the sidewalks and some large trees, where the dirt was rock-hard. Because it was a live hazard, we shut the gas to the buildings off first. The trees came out, and when we dug down and cut through the roots, we found the cause: a 1-1/4-inch PVC gas line cracked under a tree, plus a second leak at a coupling. We cut out a section of the 2-inch main, ran new 2-inch PE with transition fittings to the existing line, reduced to 1-1/4-inch PE to the building, brought it up to a new meter riser and shut-off, ran tracer wire on the new lines, and relit all the pilots. No other leaks.

A Newport Beach home: a new line from the meter to the house

At a Newport Beach home, the feed line from the meter into the house had to be replaced. We dug from the meter, under the front sidewalk, and around a large tree up to the existing gas connection. We cut out the old feed, connected at the meter with a transition fitting to PE, ran new 1-inch PE through the trench with a tracer wire, and brought it up at the house with a new ball-valve shut-off. We turned the gas on, tested for leaks, tagged both ends of the new line, backfilled, put the grass back, and relit the pilot at the water heater.

We do gas work across Orange County, including Costa Mesa, Irvine, Fountain Valley, and Garden Grove.

A second opinion on a big gas quote

Most gas calls come in well under the threshold where a second opinion matters. The bigger jobs are the ones worth a second look, because the price can be large and the diagnosis is not always right. What we see, especially on underground lines, is a homeowner told they need an entire new line when the real problem is a leaking valve. Replacing the valve would fix it; replacing the whole line sells a lot more work. It is less common on gas than on sewer lines, but it happens.

That is the reason the offer exists. If you have gotten a quote for a job of $2,500 or more and would like a second opinion, we do them for free. The customer needs to have a written estimate from the other company. Call or ask for details. If it turns out to be smaller than you were told, we will tell you that, and the decision is yours from there.

What to do if you smell gas or need gas work

If you smell gas right now:

1. Get everyone out of the house to fresh air. Avoid anything that could spark.
2. Shut the gas off at the meter if you have a wrench and know how. If not, leave it.
3. Call Southern California Gas Company at 1-800-427-2200 from outside, or 911 first if anyone is in danger.
4. Do not go back inside until the gas company clears the home.

If you need gas installation service and there is no emergency:

1. Note what you are trying to do or what you have noticed: a new appliance, a remodel, a smell that comes and goes, a red tag from the gas company, or an insurance request for an earthquake valve.
2. If the gas company has red-tagged your meter, keep the tag or pink slip. We will want to read it.
3. If another company has given you a written quote of $2,500 or more, set it aside for a free second opinion.

If you would like us to come out

We are available 24 hours a day, every day of the year. During normal business hours, Monday through Saturday, an estimate is free for work we can see and price on site. If diagnosing the problem takes a pressure test or a leak locate, we quote that diagnostic work in writing before we begin. The repair or installation is quoted in writing before any work starts. After hours and on Sundays, the visit is at overtime rates. We give a two-hour window and call when the truck is on the way.

If it turns out to be smaller than you feared, a packing nut instead of a whole new line, we will tell you that. If it is a bigger job, we will walk you through the options and the cost on each one, in writing, before any work begins.