The valves turn on/off the reverse of my home faucets. Is this normal? This caused disaster sunday night. I closed the gray tank valve sat. To collect some h2o for the black holding tank dump before going home monday. My dw accidently left the vale open after a trip to the toilet while half asleep. We woke up at 600am to 1" of h20 on the floor. We had to use every towel and rug to clean it up. I only hope there's no damage to the subfloor and underbelly. Can i reverse the valves in the bath room?