TriSpa series showerheads offer three pressurized spray patterns: the Oxygenics core, which infuses air into each drop; a multi-jet hydro massage; and focused streams, which use small pressurized jets of air-enriched water. All of the manufacturer's showerheads adjust their flow based on the incoming water pressure, lowering the flow for lower PSI rates. At a national average of about 50 PSI, the 2.5-gpm-max (at 80 PSI) TriSpa will emit approximately 1.7 to 1.9 gpm, the maker says. 800-344-3242. www.oxygenics.com.