Long Island Gas Line Installation: BBQ, Pool Heater, Generator & Appliance Lines
Every gas appliance is only as good as the pipe feeding it. A grill that never gets hot enough, a pool heater that takes all day, a generator that stumbles under load: more often than not, the problem is a gas line that was never sized for the job. All Island Comfort has been running, repairing, and testing gas piping across Suffolk and Nassau Counties since 2004. Gas line installation is one of the most requested jobs on our Long Island plumbing team, and it's work our own techs do start to finish, never subcontracted.
We handle the whole project: the BTU load calculation, the routing, the pipe itself, the shut-off valves, the pressure test, the town permit and inspection, and coordination with National Grid when your meter or service needs an upgrade. One crew, one written price, one line that works the first time the gas goes on.
- New Gas Line Installation & Sizing
- Gas Leak Detection & Repair
- BBQ Grill & Outdoor Kitchen Gas Lines
- Pool & Spa Heater Gas Lines
- Standby Generator Gas Lines
- Gas Range, Cooktop & Dryer Hookups
- Gas Fireplace, Log Set & Firepit Lines
- Gas Line Relocation for Renovations
- Pressure Testing, Permits & Inspections
- National Grid Meter & Service Coordination
Call 631-591-2289 to talk through your project, or request a written estimate online.
Smell Gas Right Now? Do This First.
Leave the house immediately. Don't flip light switches, use phones, or plug anything in while you're inside. From outside, call National Grid's gas emergency line and 911. Once the utility has shut the gas and made the home safe, call us at 631-591-2289 for the repair. For an active leak, the utility and 911 come first — never a contractor.
Call Us After It's Safe: 631-591-2289What We Run Gas Lines For
If it burns natural gas, we can pipe it. These are the projects Long Island homeowners call us for most:
BBQ Grills & Outdoor Kitchens
A dedicated natural gas line to the patio means no more propane tank swaps mid-cookout. We run buried lines across the yard to built-in grills, side burners, and full outdoor kitchens, with a shut-off at the appliance and the trench restored when we're done.
Pool & Spa Heaters
Pool heaters are BTU hogs: a typical residential unit pulls 200,000 to 400,000 BTU, more than most furnaces. An undersized line is the number-one reason pool heaters underperform. We size the line for the heater's full input, and we run the gas line and install the pool heater as one job. See our Long Island pool heater service.
Standby Generators
A whole-house generator needs a line that can deliver full BTU load at the moment everything else in the house is also calling for gas. We run the load calculation, size the line, and coordinate with National Grid if the meter or service needs to be upgraded to carry the new total.
Ranges, Cooktops & Dryers
Switching from electric to gas cooking, or moving the range in a kitchen remodel? We run new lines, relocate existing ones, install proper shut-off valves, and connect the appliance so it's ready to use.
Fireplaces, Log Sets & Firepits
Gas fireplace inserts, gas log sets in existing masonry fireplaces, garage heaters, and outdoor firepits all need correctly sized, code-compliant piping with an accessible shut-off. We handle the line; your fireplace installer handles the unit, or we connect a log set or heater directly.
New Appliance Hookups During Renovations
Additions, finished basements, and kitchen remodels often add gas appliances where no pipe exists. We rough in the new lines while the walls are open, which is the cheapest time to do it.
How We Install a New Gas Line
Gas piping isn't a place for shortcuts. Here's what a proper Long Island gas line installation includes:
Sizing for BTU Load
Every appliance has a BTU input rating, and the pipe feeding it has to deliver that load at the right pressure, over the actual length of the run, while everything else in the house is running. An undersized line starves appliances: burners that won't reach temperature, heaters that short-cycle, generators that bog down. We calculate the total connected load before we cut a single thread.
Routing
We plan the cleanest path from your meter to the appliance: through the basement, along joists, up through walls, or trenched across the yard for outdoor runs. Fewer joints means fewer potential leak points, so we route with as few fittings as the job allows.
Materials: Black Iron & CSST
Most of our work is threaded black iron pipe, the traditional standard: rigid, tough, and right for exposed basement runs and outdoor lines. Where a line has to snake through finished walls or tight framing, we use CSST (corrugated stainless steel tubing), always with the proper electrical bonding the manufacturer and code require. The right answer is usually a mix of both.
Shut-Off Valves
Every appliance gets its own accessible shut-off valve, so one appliance can be serviced or replaced without shutting gas to the whole house.
Pressure Testing Before Gas-On
Before any new line ever sees gas, we pressure-test it and monitor the gauge to confirm it holds. The line doesn't go live until the test passes and the inspector signs off. No exceptions.
Permits, Inspections & National Grid
New gas piping in Suffolk and Nassau requires a permit and inspection, and we handle both: we pull the permit, meet the inspector, and close it out. When a project pushes your total gas load past what your existing meter or service can deliver, we coordinate the meter upgrade with National Grid so you're not stuck playing middleman between the utility and your contractor.
Gas Leak Detection & Repair
Gas leaks announce themselves in different ways: the rotten-egg smell of the odorant added to natural gas, a faint hiss at a fitting, a patch of dead grass over a buried line, yellow or lazy burner flames, appliances that starve on high fire, or a gas bill that climbed with no explanation. Some leaks are obvious. Many are slow and quiet.
First, the safety rule: if you smell gas in the house, get out and call National Grid's gas emergency line and 911 from outside. Once the utility has made the home safe, that's where we come in. We locate the leak with electronic gas detectors, pressure-test the system to confirm the piping holds, and then repair the failed section or reroute the line entirely when old pipe isn't worth saving. After the repair, the system is tested again before the gas goes back on.
For non-emergency concerns, like a faint intermittent smell near an appliance or a line you suspect is aging out, call 631-591-2289 and we'll test the system properly instead of leaving you guessing.
Gas Line Problems We Fix Every Day
- Rotten-Egg Smell Indoors or Outside
- Hissing Sound at a Fitting or Valve
- Dead or Dying Grass Over a Buried Line
- Yellow or Wavering Burner Flames
- Appliances That Starve on High Fire
- Grill or Pool Heater Won't Reach Temperature
- Pilot Lights That Keep Going Out
- Soot Around a Gas Appliance
- Unexplained Jump in the Gas Bill
- Corroded or Rusted Gas Piping
- Aging Flexible Connectors Behind Appliances
- Shut-Off Valve That Won't Close Fully
- CSST Installed Without Proper Bonding
- Undersized Line Feeding Too Many Appliances
- Gas Line That Failed a Pressure Test
- Line in the Way of a Planned Renovation
Recognize one of these? Call 631-591-2289 and we'll take a look. Active leak? Utility and 911 first, from outside the house.
Gas Line Repair & Relocation During Renovations
Kitchen remodels are the classic case: the range is moving four feet, the wall behind it is coming down, and the old gas stub is now in the middle of the new island. We relocate lines, cap abandoned stubs properly, and rough in new drops so your remodel isn't held up waiting on gas work. Same story for basement finishes, laundry room moves, and additions.
If you're planning a renovation, get us in before the drywall goes up. Rerouting a line through open framing costs a fraction of doing it after the walls are closed, and we'll coordinate the permit and inspection timing with your general contractor's schedule.
Converting the Whole House from Oil to Gas?
Sometimes a gas line project isn't one appliance, it's the whole home. If you're replacing an oil-fired heating system with natural gas, the gas piping is one piece of a bigger job: the new gas boiler or furnace, the venting, the meter and service work with National Grid, the permits, and the old tank. Our oil-to-gas conversion service handles all of it as one project, and every conversion includes the complete gas piping covered on this page.
What a New Gas Line Costs on Long Island
No two gas line jobs price the same, because no two runs are the same. Here's what actually drives the number:
- Total Length of the Run
- Pipe Size (Driven by BTU Load)
- Material (Black Iron vs CSST)
- Indoor Run vs Buried Outdoor Run
- Trenching & Yard Restoration
- Number of Appliances & Branch Tees
- Shut-Off Valves & Regulators Needed
- Access Through Finished Walls or Ceilings
- Permit & Inspection Fees
- National Grid Meter Work if Load Increases
We look at the actual job, then put the price in writing before any work starts. No hidden fees, no "while we were in there" surprises. Call 631-591-2289 for a written estimate.
Why Long Island Chooses Us for Gas Line Work
Gas piping is one trade where "good enough" isn't. A sloppy joint or a skipped test isn't an inconvenience, it's a hazard. Here's how we work:
- Family-Owned in Wading River Since 2004
- Licensed & Insured for Gas Piping Work
- Every Line Sized with a Real BTU Load Calculation
- Pressure-Tested Before the Gas Ever Goes On
- Permits & Inspections Handled Start to Finish
- National Grid Coordination for Meter Upgrades
- Up-Front Written Pricing Before Work Starts
- Our Own Techs on Every Job, Never Subcontracted
How It Works: Three Easy Steps
- 1Call or Send Photos
Tell us what you're connecting (grill, pool heater, generator, range) and where it's going. Photos of the meter area and the appliance location speed up the quote.
- 2Get a Written Estimate
We size the load, walk the routing, and put the full price in writing, including the permit. If National Grid meter work is needed, we tell you up front and coordinate it.
- 3Install, Test & Inspect
Most single-appliance lines are done in a day or two. We pressure-test the line, meet the inspector, connect the appliance, and confirm everything fires correctly before we leave.
Related Long Island Services
Gas line work usually connects to a bigger project. Customers commonly book together: