Vaillant Pumps
The pump is located after the primary heat exchanger within your appliance and allows the heated water to be circulated within the closed heating system. In combi boilers , the pump is located before the diverter valve to allow circulation through the DHW and central heating systems.

Vaillant 0010030632 Pump - High Efficiency - ecoTEC Plus VU/ecoTEC Pro VUW
Part No: 1388760 MPN: 0010030632

Vaillant 0010030634 High Efficiency Pump - Ecomax VU/Thermocompact/Turbomax
Part No: 1388758 MPN: 0010030634