How Grease, Fat, and Oil (FOG) Damage Your Pipes

Grease, fat, and oil (FOG) may seem harmless when it goes down the drain, but many fats and oils cool and solidify inside plumbing systems. As deposits accumulate, they can restrict water flow, make clogs more likely, and increase the chance of sewer backups.

FOG problems typically worsen over time because small amounts add up. What’s washed away after cooking today can become tomorrow’s hardened residue along pipe walls, especially in colder sections of piping or where flow slows down.