flush
Many even if you hold the handle still don't clear, the flow is just too low. And I'm not talking about trying to shift half a canadas timber logging production either, more often than not it's the paper that is left behind.
But prone to failure or getting a lump of crud under the flap thus leaking and wasting water. Had one in a hotle the other week, no amount of handle jiggling could get the thing to seal properly.
Even this one still wasn't a particulary good flush.
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