2016 Via Gravity Fill Leak

[JTR-WO]

My 2016 Via leaks where the gravity fill line attaches to the neck of the tank. I'm hoping someone here can give me a fix without having to drop the tank. The leak can be "Felt" but not seen. Hoping there is a clamp that might need tightening.

 

[Morich]

This is one where we need more info on exactly which 2016 Via you have as there are five different versions if we include the different build dates.
I took a look to see what parts are involved and found at least three different setups for where this tube enters the tank, so we will need to know which you have to make the best suggestions.
Some have gear type clamps, while others don't! That makes the fix vary a lot as it may just need a new metal seal?? Any signs( or feel) of a metal seal that might just need to be tightened?

Next to the driver's seat, there should be a label that gives the serial number and build date, if you can sort out which you have?
Click this snip to see better!


Parts catalog here:
https://catalog3d.winnebagoind.com/menu/Parts.htm

 

[JTR-WO]

It is a 25-T
VIN: WDAPF4CA7G9652213
Build date: 01/08/2016

 

[Morich]

We can do some looking and guess on the serial number that it is a 2 but that does throw some doubt in as we don't know what your 7th digit of the serial number really is.
We'll go with the guess and hope it helps! It shows three versions of that connection, which indicates they may have had some doubts or some other reason to change the design.
But if we go by the build date, without the serial number we may get close.
The VIN is no help as that is the chassis!
Click these snips to get the best view.



If we are correct and guessing on the parts, it shows an adapter with a metal wormgear seal in yellow holding the tube on the adapter as items 9 and 10.

If possible, my preferred way would be to take the tube off and try to see if the adapter is cracked from the clamp cranked too tight or if it is just loose and needs to be tighter. While I had the tube off, I like to put some form of cheap caulking on the adapter before sliding the tube in place.
If we let the caulk set up totally before putting water on it, we can get a longer lasting seal from the double duty!

Most any caulk seems safe on the tube and plastic but it does need to cure as water will dissolve some caulks when still wet!
If it's a hard place to get into, I go slow and careful to avoid having to do it again!