Why Your Kitchen Sink Keeps Clogging (And How to Stop It for Good)

Kitchen sinks fail slowly and then all at once. Fine for years, slightly slow for a few months, then completely blocked on a Sunday when you have people over. The pipe did not fail suddenly. It closed gradually and you crossed a threshold.

What is actually in there

Warm fats, oils and grease go down as liquid and cool within a metre or two of the sink. They stick to the pipe wall. Then coffee grounds, rice, pasta starch, eggshells and food scraps stick to the grease. Add dish soap, which emulsifies grease on the way down and then releases it further along the line, and detergent scale from the dishwasher, and you get a hard, layered coating that steadily narrows the pipe.

That is why kitchen sinks behave the way they do: fine for years, then slightly slow for a few months, then completely blocked. The pipe did not fail suddenly. It closed gradually and you crossed a threshold.

Why it comes back after it is "fixed"

If someone cables your kitchen line, the cable bores an opening through the middle of the coating. Water flows. The job looks done. But the grease layer is untouched, so it closes again — often within weeks or months. A kitchen sink that clogs repeatedly needs the pipe wall cleaned, not perforated. That means hydro jetting, which strips the line back to bare pipe.

The other suspects worth checking

The P-trap — a simple blockage right under the sink, easy to clear.

The dishwasher air gap or high loop — if the dishwasher backs up into the sink, this is often the cause.

The garbage disposal — a failing or overloaded unit sends more solids into a line that cannot take them.

The vent — if the drain glugs and burps rather than flowing smoothly, the vent may be blocked, and no amount of drain cleaning will fix that.

How to stop it for good

Never pour grease down the drain. Not with hot water, not with soap. It cools further down the line and hardens there instead. Pour it into a can, let it solidify, bin it.

Scrape plates into the compost or garbage before they reach the sink.

Use a sink strainer and empty it. This alone prevents a large share of kitchen clogs.

Flush weekly with very hot water — a kettle down the drain after dishes moves soft residue before it hardens.

Skip the caustic drain cleaner. It rarely clears a grease-coated line and it damages older pipe.

Jet the line once if it has been clogging repeatedly, then keep up the habits above.

When to call a pro

If your kitchen sink has clogged more than once in the past year, or if it is slow and getting slower, call us. We will tell you honestly whether snaking or jetting is the right call, and we will fix it properly rather than just opening a hole through the middle. We serve Winnipeg, Selkirk, Steinbach, and everywhere within 100 km, 24/7. Call +1 (204) 399-4413.