Cooking fat goes down the sink as a liquid and stops being one about ten feet later. Here is how kitchen lines actually block, and the habits that keep them open.
Ask ten homeowners what clogged the kitchen sink and nine will say food scraps. It is almost always grease.
Fat leaves the pan hot and liquid. Twenty feet down a cold pipe under the floor it is a soft wax, and it sticks to the pipe wall. Every wash after that adds another layer, and the coffee grounds, rice and eggshells that would have sailed straight through a clean pipe now have something to hold onto.
Why hot water and dish soap do not solve it
They move the problem further along. Hot soapy water keeps grease liquid for another few feet, then it cools and deposits — usually in a horizontal run or at the connection to the main, which is a far more expensive place to have a blockage than the trap under your sink.
What a grease blockage looks like
- The sink drains, but slowly, and it has been getting slower for months.
- Water backs up into the second bowl, or into the dishwasher.
- A sour smell from the drain even when it is running.
- In a multi-family building, the downstairs kitchen backs up when the upstairs one drains.
Cabling versus jetting
A cable cuts a channel through a grease mat. That restores flow immediately, which is why it is the right emergency call — but the grease is still lining the pipe, and it will close again.
Hydro jetting puts high-pressure water through the line and strips the wall back to bare pipe. On a kitchen line with years of buildup it is the difference between three months of relief and three years.
What actually keeps a kitchen line open
- Pour cooled fat into a can or jar and put it in the trash. This one habit prevents more kitchen backups than everything else combined.
- Wipe greasy pans with a paper towel before washing. What ends up in the bin does not end up in the pipe.
- Use a sink strainer and empty it into the trash, not the disposal.
- Do not rely on the garbage disposal. It grinds solids finer, which makes them stick to grease more easily, not less.
- Run cold water with the disposal — cold keeps fat solid so it passes through instead of coating.
For restaurants and multi-family buildings
If you run a kitchen or manage a building, the maintenance interval matters more than the technique. A jetted line on a scheduled cycle costs a fraction of an emergency call on a Friday night with a dining room full of people, and it keeps you clear of the health-department problem a backed-up floor drain creates.
We schedule this work around service hours across NYC and northern New Jersey. Call (718) 686-8686 and we will work out a sensible interval for your line.
Common questions
Will boiling water clear a grease clog?
Rarely, and it can make things worse by moving softened grease deeper into the line where it re-hardens. It also risks damaging PVC joints and the wax seal on nearby fixtures.
How often should a restaurant kitchen line be jetted?
Most busy kitchens do well on a three to six month cycle. We set the interval from what the line looks like on the camera after the first cleaning, rather than guessing.
Is hydro jetting safe for older pipes?
In good cast iron and PVC, yes. On a pipe we can see is cracked or heavily corroded, we say so and recommend cabling or a repair instead — which is exactly why we camera the line first.
KEEP READING
More from Power Rooter
Tree Roots in Your Sewer Line: What You Can and Cannot Fix
Roots are the most common cause of repeat sewer backups in older neighborhoods. Cutting them is not a permanent fix, and here is the honest picture of what your options cost you.
Why Your Main Sewer Line Keeps Backing Up
If the same drain backs up every few months, the blockage was never really cleared. Here is what is actually going on underground, and how to tell a one-off clog from a line that needs real work.
Dealing with this right now? We run same-day trucks across NYC and northern NJ.
Call (718) 686-8686