Gas Requirements
Gas Pipe Size Required for 1000 Btu Natural Gas —
0.64 Specific Gravity at 7 ± 1.5 inch (1.62 ± .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 are in inches (mm) |
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100,000 | .75 (19.05) |
| .75 (19.05) |
| 1 (25.40) | 1 (25.40) |
| 1 (25.40) |
| 1 (25.40) |
120,000 | .75 (19.05) |
| 1 (25.40) |
| 1 (25.40) | 1 (25.40) |
| 1 (25.40) |
| 1 (25.40) |
140,000 | .75 (19.05) |
| 1 (25.40) |
| 1 (25.40) | 1 (25.40) |
| 1 (25.40) |
| 1.25 (31.75) |
160,000 | .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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IMPORTANT: 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.
IMPORTANT: 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 9
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