I looked closely and this is what I found:
1. Connection from to the tube fitting - supposedly brass
Note the crack where between the sections.
2. Valve connection to turn the water on and off at the tube - metal - supposedly brass
Note the hole in the middle burst out and split in three places.
Water inside these pieces froze during the winter and burst through the metal. These were inexpensive to replace. Imagine the same thing happening if you are not winterized and there is a freeze that reaches the piped and valves inside your Roadtrek. As it is there are drafts inside the van. It did not get below 7 degrees F this winter here on any one night. Some places can get a lot colder.
I am sharing this to show the importance of winterizing your Roadtrek or any RV if you live where it can go below 28 degrees at night over two days without the days going up into the low 40s. Water when it freezes expands and it becomes very powerful - even a small amount of water will do damage.
All this did was set us back a day to get our tank sanitizing completed and flush out the bleach/water mix out of the fresh tanks. We made a trip to both Lowes and Home Depot that late afternoon and had trouble finding the parts we needed to put it back the way it was. We did wind up changing the design and now the fill the tank from the bottom gizmo looks like this:
The hose valve has now been replaced with a faucet hose bibb - from Lowes - MC76QT #867974 -- 3/4" FIP threaded inlet. This eliminated what is shown in photo #1 and also in photo #2. The part that turns a male screw connection to a female to connect the end of a fresh water hose on the other end is the piece we first bought at this time for the "new" gizmo and that came from the plumbing section in Lowes. When this was connected with the water running the water leaked from the swivel connection. This part was returned to the store and a trip to Home Depot's garden department led us to another of these - much better made. The name and part number of that is "Metal Fittings Metal Double Female Adapter 1001565704" It is from Melnor and the SKU# is 42206 14351. This does not leak at all! The rest is left from the original.