Our Surveyor trailer came with a built in water filter. Very difficult to get to when winterizing ,almost impossible. Discussed problem with the dealer. He asked if we have a filter at our home. Answe...
The OP's comment about the filter being nearly impossible to remove is what concerns me here. That would lead to people not changing the filter as often as they should. If true, I would pull the filter and then use something external - that is either disposable or has easy filters to change.