10 Surprising Items You Must Never Pour Down the Drain

Flours

Flour plus water equals paste. Bakers cherish this property for dough, but homeowners curse it in sink traps. Even a spoonful of damp flour rolls downstream and sticks like wallpaper glue, catching stray vegetable peels and forming a sludgy barricade.
Over time, that paste hardens and narrows your drain to a trickle. Avoid rinsing mixing bowls laden with raw batter. Wipe them first with a paper towel and toss the scraps in the trash or compost. Your pipes will thank you, and so will the city sewer crew.