This part uses the following part numbers: Ariston - 995903 Ferroli - 39806180 Buderus - 87160120020 Hermann - 49003163 Immergas - 1.018320 The spare part is compatible with the following boilers: Ariston TX Ariston T2 Ariston Microgenus Ferroli Pegasus Ferroli Domicompact Buderus Logamax U042 Hermann Atlas Immergas Maior Immergas Star
