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With more than one consumer supplied from the same service pipe, a certain diversity can be expected as shown in the diagram and tables below:

| Nominal Size of Gas Pipe (inch) | |||||||||
| No. of Apartments | Length of Service Pipe (feet) | ||||||||
| 20 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | |
| 4 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 8 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 10 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 12 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2½ |
| 14 | 2 | 2 | 2 | 2 | 2 | 2½ | 2½ | 2½ | 2½ |
| 16 | 2 | 2 | 2 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 20 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 24 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 3 |
| 30 | 2½ | 2½ | 2½ | 2½ | 2½ | 3 | 3 | 3 | 3 |
| 40 | 2½ | 2½ | 3 | 3 | 3 | 3 | 3 | 3 | 4 |
| 48 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 |
| Nominal Size of Gas Pipe (inch) | |||||||||
| No. of Apartments | Length of Service Pipe (feet) | ||||||||
| 120 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | |
| 4 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 8 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 10 | 2 | 2 | 2 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 12 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 14 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 16 | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ | 2½ |
| 20 | 2½ | 2½ | 2½ | 3 | 3 | 3 | 3 | 3 | 3 |
| 24 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 30 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 40 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| 48 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
The table is based on schedule 40 pipe and can be used for a low pressure services at 6 inches of water, gas at 0.6 specific gravity and 0.3 inches of water pressure drop.
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