The fill hole for the water tank was installed in the rear wall of the RV, which made filling difficult with bikes on the bike rack. I removed the fill assembly and capped it:
Next, I drilled a 3.5” hole for the new fill assembly. It was one of those “I really hope I don’t screw this up” moments:
New fill assembly added:
On the inside, I opted to add a second water tank (the new one is the one towards the top of the photo. The fit is very snug, so I couldn’t use the new tank’s fill connecter. I cut it short and plugged it with a swimming pool freeze plug (looks like this):
The new tank fills using the pump supply line, so it fills slowly. I therefore moved the fill level sensors to the new tank. There was a great deal of plumbing to be done, but it’s all working very well now.
I also added a lengthwise support so I could split the lower bunk’s “floor”:
I did this because the lower bunk will now have a narrower mattress so that we can install floor-to-ceiling shelving for storage: