For precision water temperature control, the WCP 25 features a thermostatic mixing valve for accurate temperature control. It features preplumbed mixing valve, 3" dial thermometer, flow control valve, 1/2" N.P.T. inlet connections, 3/4" garden hose outlet connection, hot and cold water check valves, and a 30 micron reusable water filter. This unit maintains ?0.5°F accuracy at normal flow rates of 1-5 GPM. Accessories include an optional vacuum breaker and spray hose which require user installation. Pl;umbing connections required.