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Ropdoc's avatar
Ropdoc
Explorer
May 22, 2015

blank tank wont seal

Hello all,

My 5th wheel is only 6 months old. I have flushed and flushed my blank tank but it will not seal. Every time I remove the cap off the end I have to have a bucket ready. I have been careful to make sure the handles are all pushed in. What else should I do?

Also has anyone else broken the handles off of the dump tanks? Mine slip in half. I've glued them, but does not last. I guess it is time fo metal custom handles.

Thanks,
Dave
  • Thank you for the advice. We know (at least I hope my DW remembers) not to flush wipes or other objects down the line. I will have to purchase the valve. For my last trailer I made a PVC tube wand to flush the tank from the top. I guess I will have to make another one for this trailer too.

    Again Thank you.
    Dave
  • I've got the same problem and have used the same valve shown. I was going to tear into replacing the valve but actually like having the one I added as an additional stop.
  • that add on valve is nice but I went to the school of hard knocks on what happens in freezing weather.
  • It might be easy. It's happened to me but I found that after I had flushed and waited and when I thought that's all the liquid that'll come out, I put the cap on. When I took the cap off later on there was a bunch of cr*p that came out. It's just residual liquid still in the pipes. I also smartened up and put an end of line valve on the end of the sewer pipe. No more wet, stinky feet....yes I've broken the handles and just replaced with new ones. They just screw on. Hopefully it's also your problem and nothing more serious.This is the valve at this link...http://www.campingworld.com/shopping/item/twist-on-valve/27868
  • spud1957 wrote:
    Ropdoc wrote:
    Hello all,

    My 5th wheel is only 6 months old. I have flushed and flushed my blank tank but it will not seal. Every time I remove the cap off the end I have to have a bucket ready. I have been careful to make sure the handles are all pushed in. What else should I do?

    Also has anyone else broken the handles off of the dump tanks? Mine slip in half. I've glued them, but does not last. I guess it is time fo metal custom handles.

    Thanks,
    Dave


    If you are unable to easily access your valve to replace it. This will work http://www.campingworld.com/shopping/item/twist-on-valve/27868. It will at least allow you to connect the sewer hose and eliminate the dreaded bucket dance.


    Those are good to carry anyway, I always keep one In case of emergency....
  • Before replacing give a good thorough flush a try, just pick up the fitting that allows you to spray directly up the outlet while dumping, after dumping,,,try that first...
  • Ropdoc wrote:
    Hello all,

    My 5th wheel is only 6 months old. I have flushed and flushed my blank tank but it will not seal. Every time I remove the cap off the end I have to have a bucket ready. I have been careful to make sure the handles are all pushed in. What else should I do?

    Also has anyone else broken the handles off of the dump tanks? Mine slip in half. I've glued them, but does not last. I guess it is time fo metal custom handles.

    Thanks,
    Dave


    If you are unable to easily access your valve to replace it. This will work http://www.campingworld.com/shopping/item/twist-on-valve/27868. It will at least allow you to connect the sewer hose and eliminate the dreaded bucket dance.
  • I have had that problem 2 times early on when my rig was new. Both times, the culprit was debris that had lodged into the drain valve seat (namely baby wipes), not allowing the valve to close completely. I had to cut hole in belly coroplast to access the valve, remove the valve and clean the debris out.
    This was not a fun job and needless to say that baby wipes are now banned.
    I'm not saying this is your problem. It could be that the rubber Oring valve seal could be twisted.
    In either case, you will need to enter the darkside to diagnose or repair.
    If you have a dealer do it, they will likley charge you and arm and a leg if it is debris related.