Cooking fat goes down the drain as a warm liquid and does not stay that way. Within a few feet it cools, deposits on the pipe wall, and starts catching everything that passes. This is the slowest-forming and most preventable blockage in the house, and it is behind the single biggest spike in plumbing calls all year.
Need this looked at?
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How a contractor actually diagnoses it
- They ask what the kitchen line has been used for — a house that cooks daily behaves very differently from one that does not.
- They cable the line and inspect what comes back on the cutter. Grease looks and smells unmistakable.
- They decide between cabling and jetting. A cable bores a channel through grease; a jet removes it from the wall.
- If the line has blocked before, they camera it afterwards to see how much coating is left.
Three ways this actually fails
Kitchen branch coating
The classic. Builds over months, then blocks suddenly on the day something fibrous goes down after it.
Main line accumulation at a low point
Where a run flattens, cooled fat settles and hardens. This is what turns a kitchen habit into a main line job.
Commercial kitchen and grease trap failure
A trap that is not pumped on schedule stops separating, and everything downstream of it takes the load.
Signs this is urgent rather than annoying
- A kitchen sink that has slowed noticeably over a few weeks
- Recurring blockages in the same kitchen line
- Any commercial kitchen where the trap is overdue for pumping
- The week of Thanksgiving — Roto-Rooter reports service calls run about 50% above average the day after, and about 21% above average across the four-day weekend
What it costs
Published third-party ranges shown so you can sanity-check a quote. Not our prices, not an estimate, not a quote.
| Job | Published national range | Source |
|---|---|---|
| Kitchen sink drain clearing | $100–$220 | HomeGuide |
| Hydro jetting | $350–$600 (avg ~$475) | Angi |
| Grease trap cleaning (commercial) | varies by trap size and pumping schedule | industry practice |
Published national ranges, shown for educational context only. These are not quotes and they are not our prices. Sources disagree with each other — that spread is real. Only the contractor who sees your line can price your job.
Full cost guide, by fixture and by method →
Questions people ask
How do I find grease clog removal near me?
Call the number on this page and give us your town or ZIP code. We match it against partner coverage and connect you with an independent licensed contractor who works that area. We do not charge you anything — the contractor sets their own price.
Does hot water and dish soap actually help?
It moves the problem rather than solving it. The fat re-solidifies further along the line, usually somewhere much less accessible and much more expensive to reach.
Is jetting better than snaking for grease?
Yes, clearly. A cable opens a channel through the deposit; a jet scours it off the pipe wall. For a line that has blocked more than once with grease, jetting buys considerably more time.
What about bacterial or enzyme treatments?
Used regularly they genuinely slow accumulation by digesting organic residue, and they are a reasonable maintenance habit for a busy kitchen. They will not clear a line that is already blocked.
Where should cooking fat go?
Into a container, into the bin, once it has cooled. It is a small habit that removes the single most common cause of kitchen drain failure.
Why is the day after Thanksgiving so bad?
Turkey fat and starchy sides go down drains in unusual volume, over a weekend when houses are full and water use is high. Roto-Rooter has publicly reported the spike; it is a genuine annual pattern rather than a marketing line.
Can grease block a main line, not just the kitchen?
Yes. Where the run flattens, cooled fat settles and hardens, and the whole property eventually feels it.
What does it cost?
Kitchen line clearing runs about $100–$220 (HomeGuide). Jetting runs $350–$600 with an average around $475 (Angi). National ranges, not quotes.