The pump can be found after the primary heat exchanger within your heating appliance and allows the heated water to be circulated within the closed heating system. In the design of most combi boilers , the pump can be found before the diverter valve to allow circulation through the central heating and domestic hot water systems.
This part is present in 3 different boilers in the Vaillant range including the Vaillant ECOmax 665 , VU 656/4-5 , VU 656-7
Supplier Part Number: 180929
Vaillant ECOmax 665 (2006-2008)
Vaillant VU 656/4-5 (2007-2010)
Vaillant VU 656-7 (2006-2008)
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