LEED Green Associate Practice Test

What do flow fixtures measure in terms of water usage?

1. Liters per second

2. Gallons per hour

3. Gallons per minute (gpm)

4. Liters per week

The correct answer is: Gallons per minute (gpm)

Flow fixtures are specifically designed to measure water usage in terms of the rate at which water flows from them. Gallons per minute (gpm) is a standard measurement used in plumbing and water efficiency assessments, making it the most relevant unit for evaluating flow fixtures. This unit helps determine the immediate consumption of water, which is crucial for establishing efficiency and conservation practices. While liters per second, gallons per hour, and liters per week can all effectively convey water usage data, they are not as commonly used in the context of flow fixtures as gallons per minute. GPM provides a practical metric that aligns well with the typical flow rates of faucets, toilets, and other fixtures, allowing for easier comparisons and assessments of water efficiency.