How a Gas Line Is Run to a Pool Heater or House — and Inspected

How is a gas line run from the meter to a pool heater or house?

Step by step: size the pipe for everything it will feed, pull the permit, get the buried utilities marked, dig the trench, lay the pipe with its tracer wire, bring it up to a shutoff valve and a sediment trap, pressure-test it with the joints exposed, pass the inspection — and only then backfill and turn the gas on [1][3][4].

The code’s part of the job begins where the utility’s ends. For natural gas that point of delivery is the outlet of the meter; for propane it is the outlet of the service pressure regulator [2]. The fuel gas code then governs the piping from that point to the connections at each appliance [1] — the same rules whether the line feeds a pool heater, a water heater, a range or a generator. In Clearwater, CGS Energy maintains the piping from the street to the meter outlet, and every line after that outlet belongs to the customer [7].

• Size — the pipe must carry the total connected load as if every appliance ran at full capacity at once [1]
• Permit — required before a gas system is installed or altered [3]
• Locate — whoever digs notifies Sunshine 811 at least two full business days ahead [4]
• Trench — at least 12 inches of cover, with firm, continuous support under the pipe [1]
• Pipe — polyethylene marked “Gas” and “ASTM D2513”, with a tracer wire alongside [1]
• Ends — anodeless risers to metal above ground; a shutoff valve and a sediment trap at the appliance [1]
• Test and inspect — pressure test with the joints exposed; rough piping inspection before cover [1][3]
• Close up — backfill, restore the yard, then gas on after a leak check and purge [1]

Do I need a permit to run a gas line in Florida?

Yes. The Florida Building Code requires a permit before anyone installs, enlarges, alters, repairs or replaces a gas system [3], and a new line to a pool heater is new gas piping like any other.

All our gas work is done under permit. The permit is what brings the building department’s inspector to the open trench — an independent check of the work, made by someone who did not do it.

Florida’s contractor licensing law places the installation of natural gas and liquefied petroleum gas lines, with the excavation that goes with them, inside a plumbing contractor’s scope [9]. We are a certified plumbing contractor, license CFC1432506.

How deep does a gas line have to be buried in Florida?

At least 12 inches below grade. The Florida Building Code, Fuel Gas sets that minimum for underground gas piping, and allows 8 inches only for an individual line to an outdoor light, grill or other outdoor appliance — where that installation is approved and the spot is not exposed to physical damage [1].

Depth is not the only rule for the trench. Its bottom has to be graded so the pipe rests on firm, substantially continuous bearing [1] — not on a rock or a root. Gas piping does not run underground beneath a building unless it is inside a conduit or a system listed for that use [1], and plastic gas pipe may not go within or under a building or its slab at all; the exception is an outdoor patio, walkway or driveway slab, with the pipe at the same burial depth [1].

On this Westchase side yard the trench was marked off with caution tape while it stood open, and the excavated soil went into bags instead of onto the lawn.

Why is there a wire next to a yellow plastic gas line?

Because the code requires it, and because it is how the line is found again. Every underground nonmetallic gas line gets a tracer beside it — yellow insulated copper wire, or another approved conductor, of at least 18 AWG and rated for direct burial — reachable or brought above ground at each end of the plastic pipe [1]. The photograph at the top is one of ours in St. Petersburg: the yellow pipe and its tracer wire in the trench along the house.

Finding it again matters more than people expect. A Sunshine 811 ticket goes to the member utilities, and they mark only the lines they own; Sunshine 811’s own list of private lines that are not in its database includes propane or natural gas run to grills and pool heaters [5]. CGS Energy says the same from its side: it does not own, locate or maintain customers’ buried piping [7]. A private locator can follow a tracer wire; a plastic pipe on its own gives the locator nothing to follow.

The pipe is regulated too. Polyethylene gas pipe has to be made to ASTM D2513 and marked “Gas” and “ASTM D2513”, and PVC and CPVC may not be used for fuel gas at all [1]. Plastic is allowed outdoors and underground only, so at each end it comes up through an anodeless riser and continues above ground as metal; where metal and plastic meet underground, only transition fittings made to the standards the code names may join them [1].

What does a pool heater need at the end of the gas line?

Three things: a pipe big enough for its full input on top of everything else on the line, its own shutoff valve, and a sediment trap ahead of its inlet [1].

Size comes first. The code sizes gas piping for the total connected load, assuming every appliance on it could run at full capacity at the same time, and the pipe must deliver at least the minimum supply pressure each appliance needs at its inlet; the sizing tables read capacity by pipe size and length [1]. A pool heater added to a house that already has a gas water heater or range adds its whole input to that total — so the question is not only the new branch, but whether the pipe from the meter can carry everything at once. We work that out from the appliance ratings and the length of the run before the permit is pulled.

At the heater, every appliance gets its own shutoff valve, where it can be reached and upstream of the union or connector it serves [1]. Downstream of that valve, as close to the heater’s inlet as practical, goes a sediment trap — a tee with a capped nipple pointing down — unless the appliance has one built in [1]. The code excuses ranges, clothes dryers, outdoor grills, gas fireplaces and some decorative and lighting appliances from the trap; pool heaters and water heaters are not on that list [1].

Where the line runs above ground outdoors it has to be supported, protected from damage and held at least 3½ inches off the ground [1].

How is a new gas line pressure tested?

With air or an inert gas — never oxygen — at no less than 1½ times the line’s maximum working pressure and never below 3 psig, held for at least 10 minutes in a single-family home, with every joint left exposed [1].

The source of pressure is cut off before the test begins, so the gauge reads the pipe and nothing else, and the gauge is chosen to show a small loss: a mechanical gauge may not top out at more than five times the test pressure [1]. Appliances that are not part of the test are disconnected and capped, or closed off at their own shutoff valves when they are rated for the test pressure [1].

Bigger systems are held longer: outside a single-family home, a system with 10 cubic feet of pipe volume or more is held half an hour for every 500 cubic feet or part of it, and never has to go beyond 24 hours [1]. Any drop on the gauge counts as a leak unless something else clearly explains it. The leak is found with a gas detector or a leak-detecting fluid, repaired, and that part of the system tested again — and repairs or additions made after the test are tested too [1].

The gauge in the photograph is on a new riser in St. Petersburg.

What does the gas inspector check before the trench is closed?

The new piping itself, in the open trench. The Florida Building Code calls it the rough piping inspection: it is made after the new piping is installed and before any of it is covered, concealed or connected to an appliance [3]. A final piping inspection, which includes a pressure test, and a final inspection of all the new gas work follow [3].

The inspector works for the city or county that issued the permit, and each building department sets the timing and sequence of its inspections and what it looks at in each one [3] — so the visits for a pool heater line in one city may differ from the next.

The gas code states the purpose plainly: inspection and testing confirm that the materials, design, fabrication and installation practices comply [1]. On a buried run, that is what stands in the open trench:

• the depth below grade — 12 inches, or 8 where an individual outdoor line is approved [1]
• the pipe: polyethylene marked “Gas” and “ASTM D2513”, no PVC or CPVC [1]
• the tracer wire beside it, reachable or brought up at each end [1]
• the risers and the metal-to-plastic transitions, with every joint exposed [1]
• the pressure test, holding on the gauge [1]

What happens to my yard, and when is the gas turned on?

The trench is backfilled after the inspection, the yard is put back, and the gas goes on only after the new piping has been checked for leaks and purged [1][3].

We bag the excavated soil as it comes out, so the lawn beside the trench is not buried under a spoil pile, and we restore the yard when the line is covered. The photograph is the same Westchase side yard after the work.

Turning the gas on has its own steps in the code. The whole new system is first checked for open fittings or ends and for valves at unused outlets that are not closed and capped; right after the gas is let in, the piping is checked for leaks, and appliances go into operation only after that leak check, purging and a leak check of the appliance connections [1]. The utility can have a say as well: CGS Energy, for example, inspects residential gas systems before it starts service and leaves the gas off until a deficiency it finds is repaired, inspected and approved [7].

What should I do if I smell gas near a gas line?

Leave the area right away, then call the gas utility’s emergency line — or 911 if the smell is strong or you have no number — from a safe distance [8].

Do not try to find or stop the leak. Do not smoke, use a phone, a flashlight or a light switch, turn appliances on or off, or start a car or any equipment that could make a spark [8]. That is CGS Energy’s guidance for its customers in Clearwater, and it is sound for any gas line. We are not the emergency call — the utility and 911 are; call us once the immediate danger has been dealt with.

And do not dig to look for a buried line. Sunshine 811 asks homeowners to contact it before every digging project, at least two full business days ahead [6].

What this means in Clearwater, Tampa and across Tampa Bay

In Clearwater, CGS Energy maintains the gas piping from the street to the meter outlet. Every line after that outlet — to a pool heater, a grill, a generator — belongs to the customer, and CGS does not locate or maintain the customer’s buried piping [7]; a Sunshine 811 ticket does not mark it either [5]. That is why the tracer wire matters, and why the permit record for a gas line is worth keeping with the house papers.

Florida’s soil also works against buried metal: CGS Energy notes that it can encourage corrosion of buried metallic piping and, over time, leaks [7]. The code answers with materials — underground steel must be corrosion-resistant, factory-coated or cathodically protected, and zinc galvanizing alone does not count [1] — while plastic, allowed outdoors and underground only, gets its tracer wire [1].

The lines in these photographs are ours. In St. Petersburg: a polyethylene run with its tracer wire in 2025, and a new riser on test. In Westchase in 2024: a buried run along a side yard — trench open, then the same yard put back. All of it was done under permit, and these jobs passed inspection.

FAQ

Sources

We review and cite. We do not reproduce a paper or a manual — follow the links for the originals.

1. [1]2023 Florida Building Code, Fuel Gas, 8th Edition — Chapter 4: Gas Piping Installations — Florida Building Commission / International Code Council · 2023Law / code · §401.1 scope from the point of delivery to the appliance connections; §402.1–402.4 sizing for the total connected load, tables by length; §403.6 polyethylene to ASTM D2513 marked “Gas”, no PVC or CPVC; §404.9 outdoor piping at least 3½ in above ground; §404.11 corrosion protection, zinc not adequate; §404.12 burial at least 12 in, §404.12.1 8 in for individual outdoor-appliance lines where approved; §404.13 trench bearing; §404.14 under buildings only in conduit; §404.17 plastic outdoors underground only, transition fittings, tracer of at least 18 AWG; §406 test medium, at least 1½× working pressure and 3 psig, at least 10 min in a single-family dwelling, gauge range, joints exposed, leak check and purge before operation; §408.4 sediment trap; §409.5 appliance shutoff valve; read on codes.iccsafe.org in the browser 2026-10-11
2. [2]2023 Florida Building Code, Fuel Gas, 8th Edition — Chapter 2: Definitions — Florida Building Commission / International Code Council · 2023Law / code · Point of delivery: for natural gas, the outlet of the service meter assembly; for undiluted LP gas, the outlet of the service pressure regulator. Riser: a transition assembly in which plastic piping is terminated above ground outside a building; read in the browser 2026-10-11
3. [3]2023 Florida Building Code, Building, 8th Edition — Chapter 1: Scope and Administration — Florida Building Commission / International Code Council · 2023Law / code · §105.1 a permit is required before a gas system is installed, enlarged, altered, repaired or replaced; §110.3 required gas inspections — rough piping before cover, final piping including a pressure test, final; the building official sets timing, sequence and elements; read in the browser 2026-10-11
4. [4]Chapter 556, Florida Statutes — Underground Facility Damage Prevention and Safety Act — Florida Legislature · 2026Law / code · s. 556.105(1)(a): an excavator notifies the system at least 2 full business days before excavation; s. 556.108(1): exemption for a single-family owner digging on the owner’s own land only up to 10 inches; read 2026-10-11
5. [5]Private Facilities — Sunshine 811 (Sunshine State One-Call of Florida, Inc.)Government or standards body · member operators mark the lines they own; privately owned facilities are not in its database, and its residential examples include propane or natural gas run to grills and pool heaters; consider a private locator; read 2026-10-11
6. [6]Homeowner FAQs — Sunshine 811 (Sunshine State One-Call of Florida, Inc.)Government or standards body · contact 811 for every digging project, at least two full business days before digging; member utilities only mark the facilities they own; read 2026-10-11
7. [7]Customer-Owned Gas Piping: Things To Know — CGS Energy, ClearwaterGovernment or standards body · CGS maintains the piping from the street to the meter outlet; lines from the meter outlet are the customer’s; it does not own, line locate or maintain customers’ buried piping; Florida soil can encourage corrosion of buried metallic piping; residential systems are inspected before service starts and deficiencies are red-tagged; read in the browser 2026-10-11
8. [8]Report a Leak — CGS Energy, ClearwaterGovernment or standards body · leave the area; do not try to locate or stop the leak; no smoking, cell phone, flashlight, switches, appliances or vehicles; call the utility, or 911 if the smell is particularly strong or no number is available; read in the browser 2026-10-11
9. [9]Section 489.105, Florida Statutes — Definitions — Florida Legislature · 2026Law / code · (3)(m) plumbing contractor: scope includes the installation of natural gas and liquefied petroleum gas lines, and excavation work incidental thereto; read 2026-10-11
10. [10]Section 489.103, Florida Statutes — Exemptions — Florida Legislature · 2026Law / code · (7) owner-builder exemption for one- or two-family residences for the owner’s own use; the owner directly supervises, personally signs the permit application and satisfies local permitting requirements; read 2026-10-11