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 system (radiators, etc.) or to the hot water system (taps, etc.). This feature is what makes a combi boiler so popular due to the fact the boiler can provide hot water and heating without the need for a cylinder.
This part is present in 28 different boilers in the Biasi range including the Biasi PARVA SE M90.24S , PARVA SE M90.28S , PARVA HE M96.24SM/P , PARVA HE M96.28SM/P , PARVA HE M96.32SM/P .
We recommend that all parts are fitted by a fully qualified gas safe certified technician.