What happens when you flush a toilet when it already has a lot of water in the bowl?

Just random question — it's not clogged and the toilet works fine, but let's imagine the toilet bowl is filled with water to the top. Like someone just dumped tap water into the bowl all the way to the top. Then you flushed. What would happen?

16 Answers

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  • 4 months ago

    Flushes a lot faster than it fills up.

  • 5 months ago

    It would drain but that is IF it's not clogged which seems unlikely if the water level is exceptionally high.

  • 5 months ago

    If a toilet has a lot of water in the bowl, its already got a drain clog. Mop water for the floor is next.

  • Anonymous
    5 months ago

    You can't fill it to the top that way. You need to block the bottom hole with plastic otherwise water goes out the other end into the sewer. You are good for 2 flushes and it won't spill on the floor, 3 times and it spills water onto the bathroom floor. If the bowl is full of water, you got a blockage and need a plunger right now to get the paper and pooh to go down.

    • John P
      Lv 7
      5 months agoReport

      It would not fill to the top if the drain is clear, not clogged. The toilet is designed not to fill in normal use - if it fills and does not flush away, then the drain is clogged.

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  • 5 months ago

    You can't fill a toilet with water, unless it's blocked. The u bend is designed to only allow so much water into the bowl, and any more will just go down the bend into the drain.

  • 5 months ago

    Any water added "from the tap" will drain out to the normal level of the bowl if there is no clog. So your question is moot.

  • 5 months ago

    the water goes around the bend and away

  • 5 months ago

    it would work fine .... as soon as water overfills the minimum height in the trap, it empties the bowl

  • Anonymous
    5 months ago

    If it's filled to the brim it's clogged. Overflow occurs next.

  • Lôn
    Lv 7
    5 months ago

    It wouldn't happen.....try filling the bowl with water...you can't, it will empty round the U-bend.

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