Re: No Water!!
Reply #1 –
Bill, we just went thru this same issue about three months ago while in Texas. Turned out to be the back flow preventor ($35 at RV dealer) and it is right where the water hose is connected.
I did disconnect the supply line at the shut off valve to the fresh water tank and "back flushed" with a hose to clear any obstacles that might have been obstructing flow. Nothing came out the fill end so I have to believe it is the back flow preventor.
Simple to replace: Remove the three screws. Pull the flange out far enough that you can access the plastic nut that screws onto the threaded pipe end. You will need a pliers to do this.
Make sure you have some pipe caulk to put behind the flange before you put the three screws back.
Just an after thought--remove hose & screen (if any). Look into the hole and see if you can see the spring, cross pin, and plunger assembly. If they aren't assembled you have found the problem. The plunger is blocking flow.
Another item that might be causing your problem is your pressure regulator. It manifests itself by slowly causing a decrease in flow rate.