The 3M CUNO DF1 Manifold Assembly is the correct component that uses the following cartridges:
The 3M Cuno - DF1 Manifold Assembly is a dual flow, single manifold assembly. Also known as part number 6228501, this water filter manifold features series plumbed, shut-off valve and a pressure gauge.
3M CUNO Filter Manifold Assembly Specifications:
The CUNO Manifold System uses a 3/4" MNPT inlet and outlets to beverage and ice. This assembly works with selected CUNO beverage cartridges that reduces scale, bacteria, sediment and cysts.