The Psalms of Isaak series did this very well at the beginning – starts off with a magic fantasy land but as you read you realize that there were forebearers with immense science and technology, and weaves a conflict between the two.

https://en.wikipedia.org/wiki/The_Psalms_of_Isaak

The type of food that’s the worst for pipes is fats, oils, and grease. You should never put any of these down a pipe because they can solidify and cause pipes to burst. Restaurants are required by law to have a grease trap for any grease that inadvertently goes down to minimize the damage.

The occasional vegetable scraps going down a residential garbage disposal will not pose a huge problem, but keep out any fats, oils, or grease.

Yes, that makes sense. There are also light poles and things people might back into.

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