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A comment on The hotel bathroom puzzle. Parent comment

Re:The hotel bathroom puzzle by skygazer on Sunday July 15, 2018 @01:42PM (#17536183)
I’m sure I’m being daft, but how would that arrangement function as a self cleaning filter?
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Re:The hotel bathroom puzzle by josh_frome on Sunday July 15, 2018 @02:15PM (#17536309)
The sisal rope will wick based on the elevation change and deposit clean oil to the lower receptacle.
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Re:The hotel bathroom puzzle by skygazer on Sunday July 15, 2018 @07:21PM (#17537672)
Ah, so the sisal rope is just a simple filter, and not a "continuously self-cleaning" filter? I presume it's eventually fouled and must be disgarded? So this must not have been to which the ancestor was originally referring.
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