This part fits following boilers. VAILLANT ecoTEC pro 28 (2005-2010). VAILLANT ecoTEC pro 28 (2012-CURR). VAILLANT ecoTEC pro 28 R1 (2012-CURR). VAILLANT ecoTEC pro 24 (2006-2010). VAILLANT ecoTEC pro 24 (2012-CURR).
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