Take showering beyond the ordinary with this 3/4-inch MasterShower thermostatic valve. When paired with a stacked valve trim, this valve delivers a high-temperature limit stop for added safety, and a high-flow rate for precise, consistent temperature control. MasterShower thermostatic valve features an innovative shuttle design that delivers precise, consistent temperature control and a generous flow rate. Thermostatic valve allows bather to set and maintain precise temperature. Factory calibrated comfort setting at 104 degrees Fahrenheit. High-temperature safety stop ensures that water temperature stays below 120 degrees Fahrenheit. Patented K-joint installation ensures consistent trim appearance, regardless of variability in valve rough-in (included with trim). 17.2 gpm (gallons per minute) flow rate through bottom port and 14.9 gpm flow rate through top port. 3/4-inch inlet. Requires stacked valve trim (sold separately). Brass construction.