Here are a couple of pics of the water tank fill mod. It requires some 1/2" pex tubing, two 1/2" tees, one 90deg. ell and one pex valve. In the pic's there is a metal tee coming off the blue exterior water line supply. I would have used a poly tee like the one in the antifreeze inlet riser, but the store only had one poly tee, so had to use the metal one. It is not a "Shark Bite" brand, but is similar. I bought all the fittings at Lowes and would guess most home supply stores have the items to do the job.
What took the most time was finding a suitable clamp for the valve. I found one over in the electrical area that is used on conduit. The clamp had to be bored out so the clamp would not put to much force on the valve. You may find a better way to do it or have something on hand to clamp it. The whole installation should be clamped or supported so that it does not move around while going down the road and cause a leak. I have been back there while moving along at highway speeds to grab something from the frig. and it is kinda rough back there.
Hope this will save you some time and effort as you get ready to head down the road.
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