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bosworthj's avatar
bosworthj
Explorer
May 21, 2017

Fresh water tank will not fill

I have a 2016 FF 265RBSS bought off the lot as an upgrade from our old 2007 Cherokee. I checked the hot water heater bypass valve and winterizing valve by the pump and started to fill the fresh water tank. I then turned on the pump and cleared the anti freeze out of the lines. Now I am trying to get the bleach wash I to the fresh water tank and I can't get it to fill. The water overflows like the tank is full but the level indicator shows empty. I am sure I am just missing a valve or a step somewhere that my old unit didn't have and this one does. The hot water heater is a single valve system it looks like. It doesn't have any markings to indicate bypass so I am just judging I have the valve set right based on flow. Any help would be appreciated. First trip in a week and fresh water would be nice :)
  • What kind of fill does it have? Are you using a fill hose?
  • Air has to escape for the tank to fill, so check that first.. Or take it in, because if it's brand new, it should have some sort of warranty on it?

    Good luck!

    Mitch
  • Thanks for the replies. I drained the fresh water tank. There was some water in it, but it wasn't full. After it emptied I closed the drain and tried to fill it again. Same results... Water pouring down the side of the rig coming back out of the fresh water fill hole. It's brand new but I can see about pulling out the inverter under the fridge to get at it.
  • Picked up my copy of "RV Repair and Maintenance Manual" by Bob Livingston. It explained my water system. I accessed my tank fill hose by removing some cabinet drawers. Sure enough, over time, the hose had an obvious kink. Thanks for the question. I had the same problem and your question got me off the couch. The remedy took 30 seconds and required no tools.
  • I checked the hot water heater bypass valve and winterizing valve by the pump and started to fill the fresh water tank


    Fill a freshwater tank from the outside potable water inlet by unscrewing the cap ...correct ?

    Premix a 1/4 or 1/2 cup of bleach plus some water in a 1/2 gal jug. pour it into the holding tank then add another 10 gals of water.
    Now use the water pump to pump it thru your lines by turning on all H/C faucets one at a time. This will sanitize the holding tank, all the lines and faucets.

    as far as the valves. The handle should be in-line with the hose to be open. Perpendicular to the line is closed.
  • My Jayco wants to empty the thank by siphoning through the overflow. It will literally empty almost the entire tank once it gets started. I had to cut the overflow tube shorter and put a ball valve on it so that I can fill the tank. I open the valve, fill until it starts to overflow, then shut the valve and I get to camp with a full tank. We did 5 days last week and never came close to using the whole 42 gal (plus 6 gal hot water) tank.
  • Type "fresh water fill" in search bar above. Several folks have had similar problems couple of common solutions in there.
  • Try using the water, as already stated. Who says the indicators are correct?
    RichH
  • Are you certain the tank is empty? If you turn the pump on do you get water? If you are not right on a city street I would open the gray valve and then turn on the fresh pump and run water at the sinks until it runs out of water, then look for a blocked line if it wont take water. Is there a valve that switches you to city water that could be affecting it?