Product Information: The diverter valve is a device that only appears in combi boilers. It allows the hot water to be redirected to the central heating system (radiators, etc.) or to the domestic hot water 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.
We only have this part as fitting one appliance, The Ravenheat RSF 820/20T .