The diverter valve is a part that only appears in combi boilers. It allows the hot water to be guided to the central heating system (radiators, etc.) or to the DHW system (taps, etc.). This feature is what seperates a normal boiler from a combi boiler due to the boiler being able to provide heating and hot water without requiring a cylinder .
Fits the Grant Combi MKII
Fits the Grant Combi V3
Technical specification
TypeDiverter ValveMaterialMetalColourBrassManufacturer Model NoMPCBS20Brand NameGrant