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halhill3's avatar
halhill3
Explorer
Feb 07, 2014

Very cold weather, toilet overflow, sink too

Hi, I'm about two years a full timer, and I'm stumped, which is something you can't be if you are on the road.

I'm at the border/panhandle of Florida/Alabama. The weather has been in record lows, freezing or below.

Two weeks ago my toilet over flowed, what a mess. One time, no apparent reason (release valve no hanging on Aqua Magic IV); o.k. a fluke--flukes being scary as hell while RVing.

Then again, another cold snap. I had: water dripping to keep the water hose from freezing shut--but the water tanks wer--I think, yikes--pretty empty; exterior shut off on black water shut; exterior shut off on grey water open and hose exiting at a good angle.

I said a bad word, compared replacing the ball--toilet seal--valve, and the water release valve to a new toilet, and got a new Aqua Magic V. (Off the subject, but much more flimsy that the IV, but I like the univalve action on the hand model.)

Last night, below freezing. Water in a pencil-lead stream in bathroom sink and kitchen. And, the water overflowed in the bathroom sink, AND was ready to overflow in the toilet--caught that one. On "flushing" the toilet it looks like a cherry bomb had gone off in the tank, the water boiling up I pulled the flush arm. So, I don't pay good attention then.

I ran outside and opened the black water exit valve. All water disappeared--except what was on my carpet, again.

I just don't get it. My water exits are simple, one big one from the black tank, and a smaller one from the grey that joins the larger black exit pipe near the drain hookup. Nothing tricky. Soon as I opened the big valve on the black water, everything drained, like swoosh.

I think I threw away a good toilet, and bought one I didn't need. It's hard to think when the toilet is overflowing.

I don't get what's happening. I am certain it has to do with water freezing somewhere. The big puzzle is why an over flow in one tank (sink) could relate to an overflow in the other. There could have been a coincidence. That is, I simply wasn't watching the condition in the grey tank--I took my monthly shower yesterday.

Because I can't pin it down it keeps me at a low level of being freaked out. The cure for the symptom is, for very cold weather, turn off the hose, turn on the on-demand water pump connected to the onboard water supply. Then turn it off at the wall switch, then on when I want to use the water to wash or flush.

But, I'd like to solve my problem. Long post, thanks for reading and any suggestions

Hal

P.S. Put a good hair dryer on your list of RV essentials. It's unfrozen stuck valves after freezes, dried carpet, and lots of other stuff. Andy I guess it would dry my hair though I've never used it for that.
  • halhill3 wrote:
    I took my monthly shower yesterday.


    THAT is wrong on many levels, my friend...:E.. !!!

    I would check to make sure you don't have a nest or something else plugging up your air vent. In order to flush properly you need the air vent on the roof to be clear. Empty toilet, use hose and run water into the tank from the roof vent. If it bubbles up out of the roof vent, you've found your problem....Dennis
  • In your case the bathroom sink goes to your black tank as others have said. Your shower and kitchen sink go to your gray. You need to watch your levels to see what tank is filling when water is running.
  • dreamer wrote:
    It seems to me that your bathroom sink drain is plumbed to your black tank. Good luck.

    dreamer.


    That's what I was wondering.......

    Which sink are you letting water trickle....bathroom or kitchen?
    If bathroom then suspect sink drains to black tank.
    If kitchen....then black tank would NOT get full from kitchen sink tricking. BUT toilet overflowing means tank full (over full) because it wasn't dumped.
    How big is your black tank and how often to you dump?

    I'm not a proponent of letting water run........too many issues can happen.

    When it's cold enough to freeze hose, disconnect it (drain/stow) and use on-board pump. Leave it ON.
    Run RV furnace to keep warm and open cabinet doors at night to let warm air circulate inside cabinets.
  • It seems to me that your bathroom sink drain is plumbed to your black tank. Good luck.

    dreamer.
  • With below freezing temps outside, trickling water inside and gray valve open, you could end up with a completely frozen sewer hose. Happened to me in the TX panhandle one winter - 30 ft frozen popsicle.

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