VAILLANT ECOTEC EXCLUSIVE 835 & 843 VUW BOILER PUMP KIT 0020221617. WILL FIT: VAILLANT ECOTEC PLUS 837 ERP BOILER. VAILLANT ECOTEC PLUS 838 ERP BOILER. VAILLANT ECOTEC PLUS 938 ERP BOILER. Products will not be covered if misused or not serviced as per maintenance instructions.
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