There is a wonderful site for locating things like this called the "parts catalog"! Many may skip it as they are not looking for parts to order but it is very handy to use to look for where and what parts we have and how the water lines are run!
https://catalog3d.winnebagoind.com/menu/Parts.htm
Your Rv has an early and late build, so I'm not able to pin it down to which RV exactly and one of the changes is in the water supply to/from the filter, so I cut and snipped both and will let you look it over which might best fit you??
Click these snips for a better view or go direct for the whole story!
Early (pre-March build?)
Late build?
Are you aware of the cutoffs for the supply out of the filter to the frig? That would seem to be a place to check, so I outlined them for locations?
Best of luck on the chase!
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!