Semi-circle cutout in Toto Drake tank

Discussion in 'Toilet Forum discussions' started by albatross83, Oct 12, 2011.

  1. albatross83

    albatross83 New Member

    Messages:
    2
    Location:
    Colorado
    Is this normal or a defect? If it's normal, what's the purpose?

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  2. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,341
    Location:
    Yakima WA
    It's normal. That's the way they are made.
  3. SamC

    SamC Member

    Messages:
    130
    Location:
    Georgia
    Maybe it's there to allow free passage of air in and out of the tank as the water level changes.
  4. albatross83

    albatross83 New Member

    Messages:
    2
    Location:
    Colorado
    Thanks, good to know it's not a defect. I think you're probably right about the air flow... After installing and testing, this thing flushes FAST.
  5. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,341
    Location:
    Yakima WA
    The tank lid fits pretty firmly all the way around the tank, so while it might not make a truly air tight seal, it would be enough to prevent air from entering the tank fast enough for the water to release for the flush. Like holding your finger over one end of a drinking straw.

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