The M/D temperature control valve from ThermOmegaTech is designed for three-way mixing or diverting applications in reverse-osmosis filtration. It is compact and low mass for fast response. Its Thermoloid sensor/controller automatically and accurately proportions the flow in response to fluid temperature, helping improve the efficiency of the filter by more than 50 percent vs. using cold water. Using the thermostatic element incorporated in the valve body to accurately and reliably control water temperature, the valve self-regulates the temperature of water coming in. As a result of doubling the efficiency, half the amount of filters and space is needed, with less maintenance. Valves are available in multiple sizes to accommodate almost any installation. 877/379-8258; www.thermomegatech.com.