When my house was built I asked the plumber to rough in a place for a bar sink. There are three pex supply lines comming out of the wall. Red, blue and white. I know what the red and blue are for, but what about the white. My guess was for a sprayer.
Go back to the manifold to see what each color is.
Normally, a sprayer supply would come off of a faucet body diverter.
It may be possible that two of those lines are hot water? One for the sink facuet and another for a supply line to a small refrigerator ice maker?
Just my guesses for now, until a pro plumber comes along (I'm not one).
Mike
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