M-CORE is shower design on your time. This universal valve system is simpler and faster to install, and offers additional functionality with desired style choices to create an ideal shower environment. Moen has conducted extensive research to create M-CORE, and what drives the design is a passion to make the workday more streamlined for plumbers, and to give more freedom in showering functionality and design for both new construction and remodel projects. Homeowners and designers will enjoy M-CORE's improved style and finish options, including perfectly matching mixing and transfer trim, and refined details that provide the finishing touches to a dream bathroom. Once installed, M-CORE valves, with 4-Series trim, have thermostatic temperature control functionality which will allow the end user to preset the perfect water temperature, and never have to worry about the temperature of the water ever again. 4-Series reacts to temperature changes and will continuously make slight adjustments to ensure the water maintains perfect temperature. 4-Series also provides volume control functionality that allows the end user to adjust the flow volume of water, without impacting water temperature.