To convert a GPM discharge to a fixture unit load, which operation is used in the example?

To convert a GPM discharge to a fixture unit load, which operation is used in the example?

• A. Multiply by 13.2
• B. Divide by 13.2
• C. Subtract 13.2
• D. Add 13.2

Answer: (B)

Converting a GPM discharge to fixture units uses a fixed conversion factor: one fixture unit corresponds to 13.2 gallons per minute. To find how many fixture units a certain GPM rate represents, you divide the GPM by 13.2. This division converts a flow rate into a count of fixture units, since each unit is tied to that standard rate. For example, 66 GPM equals 66 ÷ 13.2 = 5 fixture units. Multiplying would give a larger number that doesn’t represent a fixture-unit count, and adding or subtracting 13.2 isn’t a valid way to convert a rate to units.

Converting a GPM discharge to fixture units uses a fixed conversion factor: one fixture unit corresponds to 13.2 gallons per minute. To find how many fixture units a certain GPM rate represents, you divide the GPM by 13.2. This division converts a flow rate into a count of fixture units, since each unit is tied to that standard rate. For example, 66 GPM equals 66 ÷ 13.2 = 5 fixture units. Multiplying would give a larger number that doesn’t represent a fixture-unit count, and adding or subtracting 13.2 isn’t a valid way to convert a rate to units.