I had same question on our 2015 model when we first got it. I called FR 5 times and got 5 different answers (all incorrect). I finally just started tearing panels off and traced down the water lines till I found it. It was located behind a door in the pantry that instead of screwing the door to the wall, they had glued it in place. So I had to destroy the door to get to valve. Then replace door and screwed it back in place. You would think, for the price they charge, they would print up an owners manual that explained these things. But then I guess they would have to build them exactly the same, rather than just sticking things where ever they decide to on any particular day.