Why older Fremont drains keep clogging

The drains we clear most often in Fremont are in the older parts of town, and the housing tells the story. Around Niles and Centerville especially, a lot of homes still run their original cast-iron stacks and galvanized branch drains, and those metals do not age gracefully. The inside wall corrodes, builds a rough crust of rust and scale, and the bore quietly narrows. A drain that started at two inches across ends up doing the work of an inch, so grease, hair, and soap that would slide through newer ABS or PVC snag on that rough surface and pack up fast.
Fremont's water adds to it. Alameda County Water District supplies the city with the same moderately hard water that scales up heaters and fixtures here, and those same minerals leave deposits inside drain and supply lines over the years. That is why a kitchen line in an older Centerville bungalow can clog a month after the last cleaning while a newer house out toward Ardenwood or Warm Springs goes years without trouble. The clog is the symptom; the aging, scaled pipe underneath is the real cause.






