Never new car washes recycled the water but it makes sense they would to be more responsible with the cities water supply or lack there of. The system probably saves them money as well , a win win.
Motor homes and RV's could stand to have a small water recycler , for the convenience of not having to empty and fill the holding tanks quite as often. A spin off effect would be extended stays and saved trips / fuel too refill the water. I Imagine some of the high end units have the feature already.
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