Vaillant Ecotec Plus 824 831 Pump Head Only 178983 (GRUNDFOS HEAD)
Will fit: VAILLANT ECOTEC PLUS 824 BOILER. VAILLANT ECOTEC PLUS 831 BOILER. CompatibleGrundfos pump head only No cable (Use your old cable). Useful Link. Products will not be covered if misused or not serviced as per maintenance instructions.