Main Heater Diverter Valve

The diverter valve is directional water mechanism that only appears in combi boilers. It allows the hot water to be sent to the central heating (radiators, etc.) or to the DHW system (taps, etc.). This feature is what seperates a normal boiler from a combi boiler due to the fact that a combi boiler wouldn?t require a cylinder to provide heating and hot water.