// CODE SNIPPET
604.10.1 Manifold Sizing
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Hot water and cold water manifolds shall be sized in accordance with Table 604.10.1. The total gallons per minute is the demand of all outlets supplied.
MANIFOLD SIZING
NOMINAL SIZE INTERNAL DIAMETER (inches) | MAXIMUM DEMAND (gpm) | |
Velocity at 4 feet per second | Velocity at 8 feet per second | |
1/2 | 2 | 5 |
3/4 | 6 | 11 |
1 | 10 | 20 |
11/4 | 15 | 31 |
11/2 | 22 | 44 |
For SI: 1 inch = 25.4 mm, 1 gallon per minute = 3.785 L/m, 1 foot per second = 0.305 m/s.
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