lashcraft,
Your 4 in hose at the back is your fresh water tank drain. It just has a screw off cap. If you are trying to winterize there is more involved than simply opening the low point drains. Several good threads here on winterizing.
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Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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