There could be a variety of reasons you are not getting water through your system.....the simplest is: do you have fresh water in the fresh water tank? If this is your first coach then I am attaching a generic plumbing diagram for a "typical" basic RV to help you visualize things. Of course every coach has variations of this (drains and valves could be different or in different locations) and the more you investigate your coach the more you will find out about its particular layout and devices.....what they do and where they are located.
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