How many fixture units are equivalent to continuous or semicontinuous flow of 1 gpm?

The correct answer to the question regarding the equivalent fixture units for continuous or semicontinuous flow of 1 gpm is based on the guidelines provided in plumbing codes, such as those from the American Society of Plumbing Engineers (ASPE).

For continuous or semicontinuous flow, plumbing systems typically assign a higher value of fixture units. According to various plumbing design resources, a flow rate of 1 gallon per minute (gpm) corresponds to an allocation of 2 fixture units. This allocation considers the necessary water demand and potential for simultaneous use, reflecting the fact that such continuous flow represents a steady water supply that impacts the overall plumbing system.

Understanding fixture units is critical for designing plumbing systems effectively; they help determine the capacity of drainage and the size of piping needed to ensure adequate supply and discharge of water within a building. Continuous flows can influence the ability of the plumbing system to accommodate multiple fixtures being used at the same time, which is why the value assigned is greater than that of intermittent use.