A low flow showerhead is rated at 2.5 gpm or less.

A low flow showerhead is rated at 2.5 gpm or less.

• A. 2.5 gpm
• B. 3.0 gpm
• C. 1.8 gpm
• D. 2.8 gpm

Answer: (A)

Low-flow is defined by a maximum flow rate of 2.5 gallons per minute or less. The 2.5 gpm rating sits right at that upper limit, so it’s the best example of the standard being tested. Any showerhead rated above 2.5 gpm (such as 3.0 gpm or 2.8 gpm) does not meet the low-flow criterion. A rating lower than 2.5 gpm, like 1.8 gpm, would also be low-flow, but this item is focusing on the threshold itself, which is 2.5 gpm.

Low-flow is defined by a maximum flow rate of 2.5 gallons per minute or less. The 2.5 gpm rating sits right at that upper limit, so it’s the best example of the standard being tested. Any showerhead rated above 2.5 gpm (such as 3.0 gpm or 2.8 gpm) does not meet the low-flow criterion. A rating lower than 2.5 gpm, like 1.8 gpm, would also be low-flow, but this item is focusing on the threshold itself, which is 2.5 gpm.