Sanitary drains continuous flow devices: drainage fixture unit values shall be computed on the basis of how many fixture units per 1 GPM of flow?

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Multiple Choice

Sanitary drains continuous flow devices: drainage fixture unit values shall be computed on the basis of how many fixture units per 1 GPM of flow?

Explanation:
Continuous-flow sanitary drains are sized by converting the discharge rate into drainage fixture units using a fixed ratio. For these devices, the standard conversion is 2 fixture units for each 1 gallon per minute of flow. So if a continuous-flow device discharges at 2 GPM, it adds 4 DFU to the drainage load (2 DFU per GPM × 2 GPM). This method helps combine all fixtures’ loads to determine the proper pipe sizing. The 2 DFU per 1 GPM rule is used because continuous flow contributes more steadily to the drainage system, and the conversion provides a consistent way to account for that load.

Continuous-flow sanitary drains are sized by converting the discharge rate into drainage fixture units using a fixed ratio. For these devices, the standard conversion is 2 fixture units for each 1 gallon per minute of flow. So if a continuous-flow device discharges at 2 GPM, it adds 4 DFU to the drainage load (2 DFU per GPM × 2 GPM). This method helps combine all fixtures’ loads to determine the proper pipe sizing. The 2 DFU per 1 GPM rule is used because continuous flow contributes more steadily to the drainage system, and the conversion provides a consistent way to account for that load.

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