What is the maximum flow rate for a hand-held shower at 80 psi?

The maximum flow rate for a hand-held shower at 80 psi is indeed 2.5 gallons per minute (gpm). This standard is established to promote water efficiency and conservation while still providing an adequate flow for user comfort. The regulations governing plumbing fixtures, which include showers, often specify flow rates to limit water usage without compromising performance. Given that 2.5 gpm is the typical maximum flow rate for showerheads under these conditions, it aligns with national standards set by organizations like the Environmental Protection Agency (EPA) and the Department of Energy (DOE).

Other flow rates listed tend to reflect older standards or different types of fixtures. For instance, flow rates of 1.5 gpm or 2.0 gpm indicate lower water consumption options that are sometimes required for newer installations or specific water-saving initiatives. A higher flow rate of 3.0 gpm does not meet the current standards for hand-held showers. Therefore, understanding these regulations helps ensure plumbing systems are both efficient and compliant.