If you only do one thing: put a coffee can or an old jar next to the stove before you start cooking, and pour every bit of fat into it instead of down the sink. That one habit prevents most of what we get called about between Thanksgiving and New Year’s.
A kitchen drain that has handled a family of four for eleven months is not a different drain in November. The house is. Fourteen people, four days, a turkey, a roasting pan, and a dishwasher running six times instead of once. The drain does not fail because it is old. It fails because the load went up ten times in a weekend.
The good news is the fix is almost entirely free and takes about ten minutes.
What you will notice, and what each one means
The sink drains, but slowly, and it gurgles. Early narrowing in the line. You have time, and now is when it is cheap to deal with.
Water backs up into the other side of a double sink. The blockage is past the tee where both bowls join, so it is in the horizontal line, not in the disposal.
The dishwasher finishes with standing water in the bottom. Almost always the disposal or the line just past it. The dishwasher drains into the disposal on most kitchens here, so when the disposal cannot get rid of water, neither can the dishwasher.
The disposal hums but does not turn. It is jammed, not dead. There is a hex wrench that came with it and a slot on the underside of the unit, and the reset button is the little square on the bottom. Turn the power off at the switch first.
The disposal does nothing at all. Press the reset button. If it pops again immediately, stop.
A floor drain or a basement toilet is also acting up, or several fixtures are slow at once. That is not a kitchen problem, that is the main line, and it needs to be dealt with today. How to tell one from the other is here.
The thing that actually clogs it
Grease, and it is not close.
The EPA’s own figure, from its report to Congress on sewer overflows, is that grease from restaurants, homes and industrial sources together is the most common cause of reported blockages, at 47 percent. The sentence that follows is the useful one: grease is a problem “because it solidifies, reduces conveyance capacity, and blocks flow.”
That is the whole mechanism. It goes down warm and liquid. It does not stay warm. Somewhere past your trap, in a pipe running under a slab or out to the street, it stops being a liquid and starts being a coating, and then everything stringy that comes after it has something to catch on.
There is a regional campaign on exactly this, run by the Metropolitan Washington Council of Governments and backed by Fairfax Water, Loudoun Water, Prince William Water, DC Water and WSSC, which means it covers essentially everybody reading this. It names the holiday directly: among its list of the worst offenders is Thanksgiving turkey fat. Their instruction is three words. Cool it, can it, trash it. Let the grease harden in the pan, scrape it into a sealable container, put the container in the trash.
The part that surprises people is the arithmetic of a shared line. As the campaign puts it, your grease joins “the grease of everyone else who has ever lived in your building and on your block,” and even a tablespoon per person adds up.
Your garbage disposal: most of what you have been told is wrong
Every list on the internet says the same thing. Never put coffee grounds, eggshells, potato peels, pasta or rice in a disposal. We looked up what the largest manufacturer actually publishes, and it does not say that.
InSinkErator’s own “what can I grind” list includes, on every model they make: apple cores, bell peppers, berries, bread, coffee grounds, cucumber, egg shells, lettuce and cabbage, orange, pasta, potato peels and rice. On their higher-end units they add banana peels, celery, chicken bones, cooked beef bones, corn cobs and pineapple cores. They publish a page calling the “you cannot put eggshells and potato skins down a disposal” idea a myth.
There is one thing they forbid, and they repeat it three times on the same page: never put fats, oils or grease into the disposal.
So the honest version is much simpler than the folklore. The stringy and fibrous warning is real but it depends on your model, and it is about celery, banana peel and rhubarb rather than about your potatoes. Bones and corn cobs belong in the trash unless you specifically own a unit rated for them. And grease is the one that is never fine, in any disposal, on any day.
Two more corrections while we are here. The manufacturers say to run cold water, not hot, both during grinding and for a few seconds after. And there are no blades in a garbage disposal. It grinds with blunt lugs on a spinning plate, which is why the trick about sharpening it with ice cubes has nothing to sharpen.
The ten minutes that prevents this
Do this the week before people arrive.
Put the grease can out where you cook. An empty coffee can, a jar, a yogurt container. If it is on the counter you will use it. If it is under the sink you will not.
Wipe greasy pans with a paper towel before they go in the sink. Arlington County puts this one in writing, and it is the single highest-value thirty seconds in the kitchen.
Run the disposal with cold water for twenty seconds and listen. A rattle means something is loose in there. A hum means it is already partly jammed and Thanksgiving is not the day to find that out.
Fill each sink bowl and let it go. A full bowl of water is a load test. If it drains slowly with nothing in the way, the line is already narrowed, and a Tuesday in November is a far better day to clear it than the Friday after Thanksgiving.
Check under the sink for a damp spot. Holiday dish volume finds every marginal slip joint in the house.
If the dishwasher has never drained right since it was installed, ask somebody to check the knockout plug. A new disposal ships with a solid plug in the dishwasher inlet, and it has to be knocked out before the hose is connected. When it is missed, the dishwasher cannot drain at all, and people live with it for years.
The day-of rules
- Nothing greasy down the drain. Not turkey fat, not pan drippings, not bacon, not the film in the roasting pan, and not gravy. Cool it, can it, trash it.
- Do not pre-load the disposal and then turn it on. The manufacturer says feed it gradually with the cold water already running.
- Scrape plates into the trash first. The disposal is for what is left after scraping, not for the plate.
- Cold water while it runs, and a few more seconds after, to carry everything past the trap.
- Keep the drain cleaner in the cabinet. Every disposal manual we read warns against caustic drain cleaner, and on a line that is already blocked it just sits there, which makes the next person’s job worse and more dangerous.
- Bathrooms: only toilet paper. Fairfax County’s wording is “only flush human waste and toilet paper,” and AlexRenew’s is “flush only toilet paper.” Wipes are the thing house guests bring with them. They do not break down, whatever the box says: a 2019 study tested 101 single use wipe products, including 23 labeled flushable, and none of them dispersed enough to pass safely through a home’s plumbing. They cost American clean water utilities about $441 million a year.
If it is already slow, or already backed up
A plunger on a kitchen sink works better than people expect, as long as you block the other bowl and the dishwasher hose is looped high. Fill the bowl with a couple of inches of water first so you are pushing water, not air.
Skip the chemical. It rarely clears a grease blockage, it makes a hot caustic hazard for whoever opens that trap next, and it can damage older pipe.
If it is more than one fixture, or if a floor drain is involved, stop and call. That is the main line, and a main line that is backing up on a holiday weekend gets worse every time somebody runs water.
Our line is answered around the clock, holidays included, at (703) 997-9757.
What it costs
Our Northern Virginia numbers, the same ones in the full drain cleaning price page:
- Single drain cleared: $200 to $800, with the middle around $430.
- Main line cleared: most between $862 and $1,630, with half landing near $1,069.
- Garbage disposal freed when it is jammed rather than dead: about $180.
- Garbage disposal replaced, unit supplied: $439 to $1,179, most between $635 and $788.
- Garbage disposal installed when you bought the unit yourself: $383 to $475.
There is one more number nobody mentions until it matters. Fairfax County states it plainly: “the resident or building owner is responsible for maintenance of the private sewer line which extends from the home to the County sewer.” Every other jurisdiction here works the same way. The pipe from your house to the street is yours, and so is the bill. If your line has backed up more than once, the answer is not another cleaning, it is a camera down the line to find out why.
Do this week
Grease can on the counter. Twenty seconds of disposal with cold water, listening. A full bowl of water down each side. That is it, and it is the difference between hosting a holiday and hosting a holiday with a plumber in the kitchen.
This is one of ten in the Cold Season Field Guide, our month by month guide to what actually goes wrong in a Northern Virginia house between September and February.
SwiftPro runs plumbing and drain service across Northern Virginia, seven days a week and through the holidays. (703) 997-9757, or book a time online.
