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John_Joey's avatar
John_Joey
Explorer
Dec 18, 2013

Lots of water and the black tank.

Blank tank threads always get a lot of responses and one of the most common responses is "use a lot of water." I see it over and over, but what does using a lot of water really do? Or is it just one of those RV.Net myths that everyone says, but there is no science behind it?

40 Replies

  • John&Joey wrote:
    oilslick wrote:
    You need to read this thread The TP thread


    Actually that is what caused me to post this thread. That threads says use a lot of water, but never gives a reason why just using the toilet in a standard way is not enough.


    OK as I have some experience here I'll post my post from there here.:)

    I read this thread with interest.. I spent my working life having to deal with the proverbial .... When you have 100 - 400 people on an aircraft ready to go and the toilets don't work, or they just flew 8 hours with no toilets and immigration won't let them off the airplane, who you conna call?? I've seen some very nasty stuff stuffed down toilets, never bothered me but most guys I worked with couldn't handle the real bad stuff especially if it's steaming.
    What it did learn was always use lots of water when flushing after dumping, this ensures that the "steaming pile" directly under the tank entry is always washed away, you don't want that "building up". Second most important is the pre charge, sure it helps keep stuff moving around and is supposed to be done on aircraft but for my RV it cuts down on capacity so ZERO pre charge for me, I just make sure the waste coming out at the end of flushing is clear. TP.. yup it collects on the sensors and stays wet, holding water after the sensors would have dried, this gives false quantity readings, a good flush takes care of this every time. Last but not least keep the stinky TP out the garbage and flush it. Now on to more important things.. toilet roll installation? Feed from the front or the rear, lets hear.
  • Old-Biscuit wrote:
    The idea behind..use lots of water......is simple
    Go #1...flush the toliet
    Go #2...fill the toilet bowl and flush the toilet (full bowl of water helps to move the poop from toilet to tank inlet area)

    Wait until tank is almost full before dumping.......the weight/volume of liquids rushing out of tank helps to carry any stuff down & out of tank

    Then a rinse/flush.

    Afterwards, flush a full toilet bowl of water back into tank so bottom stays wet and and stuff left behind doesn't dry out.
    When/if it dries out....hard as a rock...tough to get rid of and a dry tank with stuff in it will stink

    Simple......


    You see to me that is just normal use. Where does this "use a lot of water come in?"

    Also about always leaving the tank with some water in it, what do you think happens to all the non-FT that put there rigs away for the winter. That tank is dry as a bone, the next season there is never a problem.
  • The idea behind..use lots of water......is simple
    Go #1...flush the toliet
    Go #2...fill the toilet bowl and flush the toilet (full bowl of water helps to move the poop from toilet to tank inlet area)

    Wait until tank is almost full before dumping.......the weight/volume of liquids rushing out of tank helps to carry any stuff down & out of tank

    Then a rinse/flush.

    Afterwards, flush a full toilet bowl of water back into tank so bottom stays wet and and stuff left behind doesn't dry out.
    When/if it dries out....hard as a rock...tough to get rid of and a dry tank with stuff in it will stink

    Simple......
  • tenbear wrote:
    What I do is put about 3 gallons of water in the black tank after I dump, then just flush normally after that. I agree that adding several gallons with each flush is just wasting water and space in the tank. When I go to dump I add water so the tank is at least 2/3 full.

    Oh yeah. I Rinse with a Tornado every few dumps.

    X2 and traveling with 5 gals or so ensures that it sloshes around cleaning the side of the tank.
  • What I do is put about 3 gallons of water in the black tank after I dump, then just flush normally after that. I agree that adding several gallons with each flush is just wasting water and space in the tank. When I go to dump I add water so the tank is at least 2/3 full.

    Oh yeah. I Rinse with a Tornado every few dumps.
  • oilslick wrote:
    You need to read this thread The TP thread


    Actually that is what caused me to post this thread. That threads says use a lot of water, but never gives a reason why just using the toilet in a standard way is not enough.
  • Lots of water is a waste. But in most places in this country people still think it is an unlimited resource.
  • Maybe, but you know there is much more human fluid then human waste in a 24 hour period. In addition that human fluid is being flushed down with water. Why go out of your way using a lot of water.
  • Lots of water helps keep the solids from drying and keeps them in suspension so when it comes dump time, lots of water rushes out the drain taking all with it, instead of a little water trickling out the drain and leaving stuff behind it. Pretty simple concept when you think about it.

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