A double kitchen sink that repeatedly clogs is usually suffering from chronic misuse, improper garbage disposal habits, or an improper pipe slope in the branch drain line. Pouring cooking fats, grease, coffee grounds, and starchy food waste down the drain causes progressive buildup inside the shared sanitary tee. Furthermore, if the horizontal drainage pipe lacks the proper downward slope, wastewater sluggishly deposits solids, triggering recurring blockages. Verification: Scrape food scraps into the trash before washing dishes and avoid pouring cooking oil down the sink.
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