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Tank Flush Suddenly Inoperative. Looking for input.

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  • Tank Flush Suddenly Inoperative. Looking for input.

    2015 Montana 3750FL

    This weekend I had an issue with my tank flush. This was a sudden thing. I have not had any indication of a problem prior. After dumping tanks, I turned on the water to the tank flush and routinely I have been able to hear the spray working inside the tanks. Tuesday night when I started the flush I heard nothing. There was water in my drain hose but I saw no flow. I lifted the hose to drain any water out of it and checked it a few seconds later and there was only smallest amount of water that had collected in the hose.

    I turned the water off, disconnected the hose, and turned the water back on to make sure I did not have a blockage in my supply line. That was fine. Inspected the hose connection in the convenience center. That appeared OK. I removed the panel in the storage area covering the back side of the convenience center connections. I inspected the tubing and connections, disconnecting and reconnecting again looking for a blockage. I did not find anything.

    Removed what looked like a back flow preventer from the tank flush line and checked that for any damage or obvious signs of blockage. It seemed fine. I am not sure that it is passing water as I didn’t want to reconnect the hose and try to flow water that way at the campground. I will be checking that this afternoon when I get home from work.

    Has anyone had an issue like this?

    Eric
    Last edited by Egregg57; 07-05-2017, 01:31 PM. Reason: Basic writing skill corrections, paragraph forming, grammar, and acceptable, coherent English sentence structure. Minor stuff!
    Fifth Wheel: 2015 Montana 3750FL Tow Vehicle: 2013 Ford F350 6.7L Lariat, Crew Cab. Eric and Tina

  • #2
    Try filling the bowl and flushing, make sure that water passes without restriction. I have heard of flusher failure, but it usually stops spinning and still flows water. It is possible that you have a paper or some other blockage. There is a sewer attachment that will accommodate a water hose to allow back washing. I also have an old fashioned hose type flusher that use sometimes. If the tank was full it's possible that something is caught on the spinner. Hope thi helps.
    Love playing in the "Father's" yard, enjoying His Creations!

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    • #3
      Thanks Hook. Draining is not an issue. The tanks empty freely. It is the tank flushing (Spray) that isn't working. No water is passing to the sprayer.
      Fifth Wheel: 2015 Montana 3750FL Tow Vehicle: 2013 Ford F350 6.7L Lariat, Crew Cab. Eric and Tina

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      • #4
        I have had to bypass my back flow device but my problem was with it leaking, not preventing water to flow. I replaced the flush water connection with one with a built in check valve, black also so I don't mistake it for one of the other connections...
        Butch & Kathy Kettner
        2016 3160RL Legacy Package
        2016 F350 Lariat, 6.7 L, SRW, SB Crew Cab

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        • #5
          Well the back flow preventer works fine and there is good flow. Now getting a fitting to blow it down with air. There is only a trickle getting through.
          Fifth Wheel: 2015 Montana 3750FL Tow Vehicle: 2013 Ford F350 6.7L Lariat, Crew Cab. Eric and Tina

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          • #6
            Well I have blown it down, cycle water and air under pressure. Used a shop vacuum on the disconnected PEX. Was able to draw water out of the line and that's about it.

            did this several times. Reapplied water and again got a slow trickle, less than a quart a minute.

            It seems to me, Jason may have hit it on the head. It seems there is a kink, somehow, in the line, close to the sprayer.

            Scott suggested a vacuum pump and I was going to get something yesterday but that didn't work out. Maybe today.

            if nothing else I will wait for November and bring the Gregg Escape in for service.

            Sent from my SM-N910V using Tapatalk
            Fifth Wheel: 2015 Montana 3750FL Tow Vehicle: 2013 Ford F350 6.7L Lariat, Crew Cab. Eric and Tina

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