This part uses the following part numbers: Viessmann - 7831305 The part is compatible with the following boilers: Viessmann Vitopend 100-W WH1B 24kw Viessmann Vitopend 100-W WH1B 30kW Viessmann Vitopend 100 WH1D Viessmann Vitopend 100 A1JB Viessmann Vitopend 100 A1JB
