There is a lot of confusion today about what a low-flow showerhead really is. While many people don’t know this, or really even need to know this, the flow-rate for showerheads was restricted to 2.5gpm, or 2.5 gallons per minute, for all shower heads made and sold in the US after January 1, 1994. However, because there are plenty of ways around this regulation, one of which was comically pointed out in the Seinfeld episode, The Shower Head, not all shower heads in use or even sold in the US meet the 2.5gpm maximum flow rate standard.
Nowadays, every shower head that is manufactured and sold in the US, whether it’s at a local Lowe’s, Home Depot or through Walmart.com is limited, by law, to a maximum 2.5gpm flow rate. This doesn’t mean, however, that your showerhead’s flow rate, or gallons-per-minute (gpm) usage is at or below the maximum legal threshold.
While homeowners enjoy the freedom of being able to use low-flow showerheads by replacing their inefficient shower heads at will, this option isn’t always available to those who rent a house or an apartment. If you rent an apartment or a house, there are two reasons why you might want to install a low-flow showerhead in your bathroom: