Gas Requirements
Gas Pipe Size Required for 1000 Btu Natural Gas — 0.64 Specific Gravity at 7 ± 1.5 inches (17.4 ± 4 mbar, 1.74 ± 0.37 kPa) Water Column Pressure
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| Equivalent Length |
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Gas | 25 feet |
| 50 feet | 75 feet | 100 feet | 125 feet |
| 150 feet |
| (7.63 m) |
| (15.25 m) | (22.88 m) | (30.50 m) | (38.13 m) |
| (45.75 m) | |
| Appliances |
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| Based on 0.3 in. Water Column Pressure Drop for Length Given |
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| Total Btu/hr |
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| Sizes shown in inches (mm) |
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| 100,000 | 0.75 (19.05) |
| 0.75 (19.05) | 1 (25.40) | 1 (25.40) | 1 (25.40) |
| 1 (25.40) |
| 120,000 | 0.75 (19.05) |
| 1 (25.40) | 1 (25.40) | 1 (25.40) | 1 (25.40) |
| 1 (25.40) |
| 140,000 | 0.75 (19.05) |
| 1 (25.40) | 1 (25.40) | 1 (25.40) | 1 (25.40) |
| 1.25 (31.75) |
| 160,000 | 0.75 (19.05) |
| 1 (25.40) | 1 (25.40) | 1.25 (31.75) | 1.25 (31.75) |
| 1.25 (31.75) |
| 180,000 | 1 (25.40) |
| 1 (25.40) | 1 (25.40) | 1.25 (31.75) | 1.25 (31.75) |
| 1.25 (31.75) |
| 200,000 | 1 (25.40) |
| 1 (25.40) | 1.25 (31.75) | 1.25 (31.75) | 1.25 (31.75) |
| 1.5 (38.10) |
| 300,000 | 1 (25.40) |
| 1.25 (31.75) | 1.25 (31.75) | 1.5 (38.10) | 1.5 (38.10) |
| 1.5 (38.10) |
| 400,000 | 1.25 (31.75) |
| 1.25 (31.75) | 1.5 (38.10) | 1.5 (38.10) | 1.5 (38.10) |
| 2 (50.80) |
| 500,000 | 1.25 (31.75) |
| 1.5 (38.10) | 1.5 (38.10) | 2 (50.80) | 2 (50.80) |
| 2 (50.80) |
| 600,000 | 1.5 (38.10) |
| 1.5 (38.10) | 2 (50.80) | 2 (50.80) | 2 (50.80) |
| 2 (50.80) |
| 700,000 | 1.5 (38.10) |
| 2 (50.80) | 2 (50.80) | 2 (50.80) | 2 (50.80) |
| 2.5 (63.50) |
| 800,000 | 1.5 (38.10) |
| 2 (50.80) | 2 (50.80) | 2 (50.80) | 2.5 (63.50) |
| 2.5 (63.50) |
| 900,000 | 2 (50.80) |
| 2 (50.80) | 2 (50.80) | 2.5 (63.50) | 2.5 (63.50) |
| 2.5 (63.50) |
| 1,000,000 | 2 (50.80) |
| 2 (50.80) | 2 (50.80) | 2.5 (63.50) | 2.5 (63.50) |
| 2.5 (63.50) |
| 1,100,000 | 2 (50.80) |
| 2 (50.80) | 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) |
| 2.5 (63.50) |
| 1,200,000 | 2 (50.80) |
| 2 (50.80) | 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) |
| 2.5 (63.50) |
| 1,300,000 | 2 (50.80) |
| 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) |
| 3 (76.20) |
| 1,400,000 | 2 (50.80) |
| 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) | 3 (76.20) |
| 3 (76.20) |
| 1,500,000 | 2 (50.80) |
| 2.5 (63.50) | 2.5 (63.50) | 2.5 (63.50) | 3 (76.20) |
| 3 (76.20) |
| 1,600,000 | 2 (50.80) |
| 2.5 (63.50) | 2.5 (63.50) | 3 (76.20) | 3 (76.20) |
| 3 (76.20) |
| 1,700,000 | 2 (50.80) |
| 2.5 (63.50) | 2.5 (63.50) | 3 (76.20) | 3 (76.20) |
| 3 (76.20) |
| 1,800,000 | 2.5 (63.50) |
| 2.5 (63.50) | 3 (76.20) | 3 (76.20) | 3 (76.20) |
| 3 (76.20) |
| 1,900,000 | 2.5 (63.50) |
| 2.5 (63.50) | 3 (76.20) | 3 (76.20) | 3 (76.20) |
| 3 (76.20) |
| 2,000,000 | 2.5 (63.50) |
| 2.5 (63.50) | 3 (76.20) | 3 (76.20) | 3 (76.20) |
| 3.5 (88.90) |
| 2,200,000 | 2.5 (63.50) |
| 3 (76.20) | 3 (76.20) | 3 (76.20) | 3.5 (88.90) |
| 3.5 (88.90) |
| 2,400,000 | 2.5 (63.50) |
| 3 (76.20) | 3 (76.20) | 3 (76.20) | 3.5 (88.90) |
| 3.5 (88.90) |
| 2,600,000 | 2.5 (63.50) |
| 3 (76.20) | 3 (76.20) | 3.5 (88.90) | 3.5 (88.90) |
| 3.5 (88.90) |
| 2,800,000 | 2.5 (63.50) |
| 3 (76.20) | 3 (76.20) | 3.5 (88.90) | 3.5 (88.90) |
| 3.5 (88.90) |
| 3,000,000 | 2.5 (63.50) |
| 3 (76.20) | 3.5 (88.90) | 3.5 (88.90) | 3.5 (88.90) |
| 4 (101.60) |
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For L.P. Gas, correct the total Btu/hr by multiplying it by 0.6. The answer is the equivalent Btu on the above chart.
The installation must conform with local codes or, in the absence of local codes:
●with the latest edition of the “National Fuel Gas Code,” ANSI Z223.1/NFPA 54 in the U.S.A.,
●with●and Australian Gas Association/Australian L.P. Gas Association requirements in Australia.
Table 5
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