How can the fixture unit flow rate be calculated?

The calculation of fixture unit flow rate is based on the conversion from total discharge flow to fixture units, which is often done using a specific conversion factor. The correct approach involves determining how many cubic feet of water are available based on the gallon per foot cubed conversion factor. By dividing the total discharge flow by the factor of 7.5 gallons per cubic foot, you're effectively converting the total flow into a unit measurement that aligns with the plumbing code and standards for evaluating water flow in fixture units.

This method ensures that you account for the water flow in a manner that accurately reflects the plumbing system's capability. In plumbing design, understanding flow rates and fixture units allows engineers to properly size piping and determine system performance, ensuring an adequate supply of water to meet user demands.