Fats, oils and grease (FOG) are the most common cause of kitchen drain clogs we see, and the guidance the City of Fountain Valley publishes is simple: keep grease out of the drain.
Grease goes down the sink warm and liquid. Under the slab it cools, sticks to the pipe wall, and catches food particles and soap. Over months the opening gets smaller until the sink stops draining. Hot water and dish soap move grease a few feet farther down the line. They do not get rid of it.
The City shares the County's property owner guide to private sewer laterals, which states that fats, oils and grease can get into the private lateral from household drains. Its prevention advice, in short:
- "The drain is not a dump." Only water, soap and toilet paper belong in drains.
- Use a mesh strainer in the kitchen sink to catch food scraps.
- Scrape plates and pans into the organics bin, not the sink.
- Let cooking grease cool, then pour it into a metal can for proper disposal.
- Flush only toilet paper. Wipes labeled "flushable", feminine products and rags cause blockages.
Garbage disposals do not change the rule. A disposal grinds food smaller, but the pieces still need to travel the length of your kitchen branch and lateral, and ground food sticks to grease the same way whole scraps do. If your disposal is jammed or humming, our toilets, faucets and fixtures team handles disposal repair and replacement.
Why grease clogs come back
A cable punches a hole through a grease plug, and the sink drains again. The grease still lining the pipe wall stays behind, so the next clog forms faster. When a kitchen line has clogged two or three times in a year, we usually recommend hydro jetting, which scours the pipe wall instead of just opening a hole. Restaurants and food service kitchens deal with this on a bigger scale; our commercial plumbing page covers grease lines and after-hours work for businesses.