NFPA 54 / FPC §409 sizing tables, meter selection, and FL permit requirements
NFPA 54 · FPC §409 · Natural Gas & Propane · FL Permit Ready| Appliance | Typical BTU/hr | Notes |
|---|---|---|
| Tankless WH — condensing | 150,000–199,000 | Check nameplate |
| Tankless WH — non-condensing | 120,000–150,000 | High demand |
| Storage WH (40 gal) | 32,000–40,000 | FHR affects size |
| Storage WH (50 gal) | 36,000–50,000 | Most common FL |
| Storage WH (75 gal) | 60,000–75,000 | Large household |
| Gas Furnace | 40,000–150,000 | Per nameplate |
| Gas Range (5-burner) | 55,000–65,000 | All burners + oven |
| Gas Cooktop (4-burner) | 36,000–48,000 | No oven |
| Gas Dryer (standard) | 22,000 | DOE standard |
| Gas Dryer (high-cap) | 30,000–35,000 | DG series |
| Generator — 10 kW | 125,000–145,000 | At full load |
| Generator — 16 kW | 175,000–195,000 | Very common FL |
| Generator — 22 kW (Generac) | 245,000–260,000 | Standard Generac |
| Generator — 26 kW | 305,000–330,000 | Full home backup |
| Pool/Spa Heater — 200 MBH | 200,000 | Typical FL pool |
| Pool/Spa Heater — 400 MBH | 400,000 | Large pool/spa |
| Outdoor Grill | 40,000–60,000 | Estimate |
| Gas Fireplace / Logs | 25,000–80,000 | Per insert |
| Gas Boiler / Hydronic | 80,000–175,000 | Per rating |
| Gas Space Heater | 20,000–30,000 | Wall/floor mount |
| Pipe Size | 20 ft | 40 ft | 60 ft | 80 ft | 100 ft | 150 ft | 200 ft |
|---|---|---|---|---|---|---|---|
| 1/2″ | 119,000 | 84,000 | 68,000 | 59,000 | 52,000 | 42,000 | 37,000 |
| 3/4″ | 255,000 | 178,000 | 145,000 | 127,000 | 111,000 | 90,000 | 79,000 |
| 1″ | 476,000 | 332,000 | 273,000 | 238,000 | 209,000 | 168,000 | 146,000 |
| 1-1/4″ | 987,000 | 687,000 | 562,000 | 491,000 | 428,000 | 347,000 | 303,000 |
| 1-1/2″ | 1,482,000 | 1,032,000 | 845,000 | 738,000 | 643,000 | 522,000 | 456,000 |
| 2″ | 2,831,000 | 1,971,000 | 1,613,000 | 1,410,000 | 1,226,000 | 996,000 | 869,000 |
| 2-1/2″ | 4,897,000 | 3,410,000 | 2,791,000 | 2,440,000 | 2,122,000 | 1,724,000 | 1,503,000 |
| 3″ | 9,163,000 | 6,380,000 | 5,222,000 | 4,564,000 | 3,970,000 | 3,226,000 | 2,814,000 |
| CSST Size | 20 ft | 40 ft | 60 ft | 100 ft | 150 ft |
|---|---|---|---|---|---|
| 3/8″ CSST | 50,000 | 35,000 | 28,000 | 22,000 | 18,000 |
| 1/2″ CSST | 117,000 | 81,000 | 66,000 | 51,000 | 41,000 |
| 3/4″ CSST | 276,000 | 192,000 | 157,000 | 121,000 | 98,000 |
| 1″ CSST | 544,000 | 379,000 | 310,000 | 239,000 | 194,000 |
| 1-1/4″ CSST | 970,000 | 676,000 | 553,000 | 427,000 | 347,000 |
| Meter Size | Max Capacity | Max BTU/hr | Typical Use |
|---|---|---|---|
| B-175 (175 CFH) | 175 CFH | 178,500 | WH + range + dryer |
| B-250 (250 CFH) | 250 CFH | 255,000 | Adds small generator or pool heater |
| 425 CFH Diaphragm | 425 CFH | 433,500 | WH + furnace + gen + pool |
| 800 CFH | 800 CFH | 816,000 | Large residential / commercial |
| 1,600 CFH | 1,600 CFH | 1,632,000 | Commercial / industrial |
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On this page, Florida gas line sizing estimates run about $250-$600, depending on home size, materials, and project scope. Use the calculator above for a Florida-specific estimate.
Pricing depends on the size and layout of your home, the pipe materials and fixtures you choose, your Florida region and local labor rates, and permit fees. Work that is more complex or harder to access generally costs more.
In Florida, minor maintenance may be DIY, but anything beyond that generally calls for a licensed plumber, and many jobs require a permit and inspection. When a permit, gas work, or your main water or drain lines are involved, hire a Florida-licensed plumber.
It depends on the cause and your specific policy. Sudden, accidental damage is more often covered than gradual wear-and-tear or maintenance - confirm the details with your insurer.
Timelines depend on scope - many routine jobs take a few hours to a day, while larger projects run longer. Your licensed plumber can confirm after assessing your home.
Planning estimate, not a quote — confirm with a licensed Florida plumber. Confidence is qualitative: ranges reflect this page’s Florida assumptions, not a guaranteed price.
Estimates on this page are Florida-specific and reflect Gas Line Sizing Calc for typical Florida homes.
From this page: On this page, Florida gas line sizing estimates run about $250-$600, depending on home size, materials, and project scope. Use the calculator above for a Florida-specific estimate.
Your actual cost depends on your home's condition, layout, and local labor and permit rates.
From this page: Pricing depends on the size and layout of your home, the pipe materials and fixtures you choose, your Florida region and local labor rates, and permit fees. Work that is more complex or harder to access generally costs more.
Generally raises cost: harder access, older homes, added permits and inspections, premium fixtures or materials, and emergency or after-hours work.
Generally lowers cost: easy access, bundling several items in one visit, standard fixtures, and off-peak scheduling.
Curated Florida tools and resources related to this page.
Last reviewed: July 1, 2026 (US Eastern)
Reviewed by the FL Plumbing Tools editorial team.
Sources: Florida plumbing cost research and Florida Building Code / local authority-having-jurisdiction (AHJ) permit references.
Florida reference: Estimates and guidance reflect Florida labor rates, permitting, hard water, humidity, and coastal conditions.
Updates: Reviewed periodically and updated as Florida codes, permit fees, and market rates change.