Seems to me that if the design of household drains was sensitive to
turbulence, someone would have figured out how to fix it in the 19th
century.
-- rec --
<TMI> Of Plungers, Snakes, Toilet Jacks, Gong-Farmers
<https://tpssupply.com/your-blog/f/%F0%9F%9A%BDplunging-into-the-past-a-brief-history-of-the-toilet-plunger%F0%9F%92%A9#:~:text=The%20ancient%20Greeks%20used%20a,we%20know%20it%20was%20invented.>
and the Pythagorean Cup
<https://en.wikipedia.org/wiki/Pythagorean_cup></TMI>
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