location of water filter in 2500 durango 5th wheel

HELP! There is nothing in the owner manual and haven't found anything online as to the location of the water filter. The first year we had our dealer winterize our 2018 2500 Durango. They forgot to remove the water from the bottom of the water filter - the filter broke and leaked out into our storage compartment. We thought it was funny because they should have known to do that. This past winter, we forgot to empty the water filter before winterizing! So when we flushed the system today we have a leak in the storage compartment. Before we take everything out to remove panels we though we should check with others (dealer is closed at this time of day).  In the directions to winterize - NOTHING is said about the built in water filter!!!!