(A) The size of pipe and maximum length of run thereof for hot air furnaces and low pressure steam or circulating water boilers shall be determined by the following table.
Number of Rooms
|
Size of Pipe (Inches)
|
Length (Feet)
| ||||
1¼ | 1½ | 2 | 2½ | 3 | 4 | |
10 or less | 70 | 100 | 150 | 200 | 300 | 400 |
11 to 15 | 80 | 120 | 160 | 240 | 300 | |
16 to 25 | 100 | 140 | 200 | 250 | ||
26 to 50 | 120 | 170 | 200 | |||
51 to 80 | 140 | 170 | ||||
(B) Whenever two pipes regulated by this section or one pipe regulated by § 54.36 have the same supply pipe; such supply pipe shall be one standard size larger than the largest of such pipes supplied thereby.
(`85 Code, § 20-65)