Will fit: VAILLANT ECOTEC PLUS VUW 824 BOILER. VAILLANT ECOTEC PLUS VUW 831 BOILER. VAILLANT ECOTEC PLUS VUW 837 BOILER. VAILLANT ECOTEC PRO 24 BOILER. VAILLANT ECOTEC PRO 28 BOILER. Products will not be covered if misused or not serviced as per maintenance instructions.
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