I'm hurt by some of the misapprehensions passed on to good Abers by bad teachers. Or dodgy research.
PP: changes between the 1500s and the 1840s of Dr. F's extract were immense. Manchester, alluded to in the article, was a small market town even at the start of the 1700s. And in these smaller settings, disposing of waste and sewerage didn't pose major problems. Most was recycled straight onto the surrounding fields. And the path of the River Medlock is a bit more complex than you describe. I think you mean the Refuge Building, not the Pru.
Habits of personal cleanliness actually declined after the 1500s, possibly in step with growing protestant extremism which was very uneasy with nudity and body functions. So 18th century gentry were dirtier than their medieval counterparts.
Pasta: 'squatting in a corner'.....well people were as modest as circumstances and society demanded. Popping out to pay a visit in the nearest stable or cowshed was the 'village way'.