What is the maximum flow rate for a showerhead as per current codes?

The maximum flow rate for a showerhead as per current plumbing codes is indeed 2.5 gallons per minute (GPM). This regulation is in place primarily to promote water conservation while still providing an adequate amount of water for an effective and comfortable showering experience.

Over the years, various plumbing codes have been updated to reflect standards that help reduce water usage in homes. For instance, the Energy Policy Act of 1992 set the maximum flow rate for showerheads at 2.5 GPM, a standard that has been adopted and maintained in many plumbing codes today.

Although other options present lower flow rates, they are not the mandated maximum for showerheads. Selecting a flow rate lower than 2.5 GPM may limit the user experience in terms of water pressure and coverage while showering, which is why that particular figure has been standardized to balance efficiency and comfort effectively.