Will fit: VAILLANT ECOFIT PURE SYSTEM 612 VU 126/6-3 BOILER. VAILLANT ECOFIT PURE SYSTEM 615 VU 156/6-3 BOILER. VAILLANT ECOFIT PURE SYSTEM 618 VU 186/6-3 BOILER. Products will not be covered if misused or not serviced as per maintenance instructions.
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