Kingston Brass KB2631DXSO Concord Shower Only , Polished Chrome Meets ASME A112.18.1, ANSI/NSF 61 Sec. 9 code 1/4-turn washerless cartridge Fine artistic craftsmanship Max 1.8 GPM/6.8 LPM Water Flow Rate At 80 PSI On Showerhead Compliant with California Energy Commission Title 20