Why Newark drains clog again and again

A lot of the homes we clear drains in around Newark went up in the 1960s and 1970s, and plenty still run on their original galvanized branch drains and cast-iron stacks. Those metals do not stay smooth. The inside wall corrodes, builds up a rough crust of rust and scale, and the bore slowly narrows. A pipe that started at two inches across can be doing the work of an inch by the time we get there. Grease, hair, and soap that would slide through new ABS or PVC snag on that rough wall and pack up fast.
Newark's water makes it worse. Alameda County Water District water is moderately hard, so the same minerals that scale up your water heater and shower head also leave deposits inside your drain and supply lines over the years. That is why a drain in an older Cherry-Guardino or Old Town Newark home can back up a month after the last cleaning while a newer house on the same block goes years without trouble. The clog is a symptom; the aging pipe is the cause.







