Vaillant 178978 0020132682 ecotec pro 24 pro 28 diverter valve complete original
PART NUMBER : 178978. OLD PART NO. 178978. VAILLANT ECO TEC DIVERTER VALVE. DIVERTER VALVE FOR VAILLANT ECOTEC PLUS 824. ECOTEC PLUS 831. ECOTEC PLUS 837. ECOTEC PLUS 937.