Plumbing guide · Lakeville, MN
How to Unclog a Drain, and When to Call a Plumber
Most clogs give way to a plunger and a hand auger. Here is how to unclog a drain step by step, which fixtures behave differently, and the signs that mean put the tools down.
Emergency? Call now, 24/7(952) 000-0000- Test how far it reachesOne fixture or several? The answer sets your plan.
- Plunge, trap, then augerWork from the gentlest tool to the deepest.
- Stop at the red flagsSewage or a gurgling floor drain means call.
How to unclog a drain: the short answer
- Find out which fixtures are affectedOne slow drain is a household job. Several is not.
- Plunge with a seal firstBlock overflow openings and second drains so pressure goes down the pipe.
- Open the trap, then use an augerMost kitchen and sink clogs sit in the trap or just past it.
- Skip strong chemicalsThey can hurt you, the pipe and the next person who works on the line.
- Call when the basement drain acts upThat points to the main line.
Before you learn how to unclog a drain, find out how far the clog reaches
One slow drain and a whole house of slow drains are different problems. Spend two minutes testing before you pick up a tool.
| Test | What it tells you | Result | Meaning |
|---|---|---|---|
| Run the other sinks and tubs for a minute | Whether the problem is local or shared | Only one fixture is slow | A clog in that fixture or its short branch |
| Flush a toilet while watching the tub | Whether the toilet and tub share a line | Water rises in the tub | The shared branch or the main line is partly blocked |
| Listen at the basement floor drain | Whether the main line is moving | Gurgling when upstairs water runs | Main line trouble |
| Check the lowest fixture in the house | Water finds the lowest point first | Floor drain or basement shower backs up | A main-line blockage |
| Run the washing machine drain briefly | Whether the laundry standpipe is the weak point | Standpipe overflows or gurgles | Laundry line or the main |
Stop here if sewage is coming up
Water bubbling out of a basement floor drain, a shower or a toilet in the lowest part of the house is not a household clog. Stop using water, keep people and pets away from the backed-up area, and call. Do not pour chemicals into the line.
A short kit that handles most household clogs
You do not need a truckload of gadgets. A few inexpensive items cover nearly everything inside a house.
Five items, and what each is for
The workhorse is a cup plunger for sinks, tubs and showers. A flange plunger, which has a fold-out rubber collar, is made for toilets. A hand-crank drain auger, sometimes called a snake, reaches things a plunger cannot. A toilet auger has a protective sleeve so it does not scratch porcelain. A wet-dry vacuum is a surprisingly good way to pull a clog out of a tub or sink drain.
Keep the kit together in one bucket under the basement stairs or in a utility closet. A clog at ten at night is much easier to handle when the plunger is not buried behind the holiday decorations. Wash and dry each tool after use, because a damp auger left coiled in a bucket smells for weeks.
Add rubber gloves, safety glasses, a bucket and old towels. If the problem keeps coming back after you clear it, a plumber can use a camera or a high-pressure cleaner, as described on the hydro jetting page.
- Cup plungerFor flat-bottomed sinks, tubs, showers.
- Flange plungerFor toilets only.
- Hand-crank augerFor clogs deeper in the pipe.
- Toilet augerProtected end for porcelain.
- Wet-dry vacuumPulls a clog back out of a tub or sink.
- Gloves, glasses, bucketDrain gunk carries bacteria.
How to unclog a drain in the kitchen, from simplest to deepest
Kitchen drains clog differently from bathroom drains. Grease, starch and food scraps build a slow, sticky wall that narrows the pipe.
Turn off the disposal and look
Switch the disposal off at the wall. If something is visible, use tongs to pull it, never your hand.
Seal the second drain
A double sink has two drains sharing a trap. Plug the second with a rubber stopper or a wet cloth so the plunger can work.
Plunge in a steady rhythm
Cover the drain with a few inches of water. Push down firmly, pull up sharply, and repeat for around twenty seconds. Lift the plunger to see if the water drops.
Open the trap
Put a bucket under the curved pipe below the sink. Loosen the slip nuts, slide the trap away and empty it. Grease and sludge often sit right there.
Snake the wall stub
Feed the auger into the pipe that goes into the wall. When you feel resistance, turn the handle and push slowly. Pull out and rinse.
Put it back and flush with hot water
Rebuild the trap by hand, then run hot tap water for a minute while watching for drips.
If the disposal hums and does not turn, that is a disposal fault, not a clog; see garbage disposal repair. If the sink drains for a day and clogs again, the blockage is deeper than your auger can reach.
Bathroom sinks, tubs and showers: pull it, do not push it
Bathroom clogs are mostly hair and soap. The best fix is to remove the clump rather than punch it deeper into the pipe.
Where the hair hides
In a bathroom sink, the stopper has a pivot rod behind the faucet. Lift it out, wipe it, and look for a hair wad wrapped around the stem. In a tub, remove the strainer or stopper and look below it. A plastic barbed hair tool, slid down and pulled out, brings up a surprising amount.
If you still cannot get water to move, use the plunger with the overflow opening blocked by a wet rag. That seals the system so pressure goes where you want it. Persistent tub trouble, with slow drain even after clearing, is covered on the bathtub drain repair page.
| Fixture | Typical culprit | Best first tool |
|---|---|---|
| Bathroom sink | Hair and toothpaste on the pivot rod | Remove stopper, hair tool |
| Tub | Hair under the strainer | Hair tool, then hand auger |
| Shower stall | Hair at the drain basket | Lift basket, hair tool |
| Pedestal sink with pop-up | Gunk on the lift rod | Unscrew the pivot nut, clean |
| Utility sink | Lint and debris | Plunger, auger |
How to unclog a toilet without making a mess
Toilets have a built-in curved passage that is easy to block and easy to clear if you do it in the right order.
| Order | Do this | Why |
|---|---|---|
| 1 | Stop flushing. If water is rising, lift the tank lid and push the flapper down | Prevents an overflow |
| 2 | Lay towels and wear gloves | Cleaner and safer |
| 3 | Use a flange plunger, seated so the collar fills the outlet | A seal is what moves water |
| 4 | Push gently once to push out air, then pump firmly | Avoids splashing |
| 5 | Try a toilet auger if plunging fails | Reaches past the curve |
| 6 | Flush once, watching the bowl | Confirms the line is clear |
If a toilet clogs again and again, or flushing makes another fixture gurgle, the problem is not the toilet. See toilet repair for fixture trouble and clogged drain for blockages beyond reach.
Basement floor drains, laundry standpipes and the lowest drains in the house
Many Minnesota homes have a basement, and a basement means a floor drain and often a laundry standpipe. They clog differently from upstairs fixtures.
Why the lowest drain tells the story
A floor drain sits near the main sewer line. It rarely gets used, so the trap seal can dry out in dry months, letting odor in. Pour a quart of water down it every few months to refill the trap. If it backs up instead, that is a warning that the main line is slowing down.
A laundry standpipe takes a lot of water quickly, plus lint. A lint trap on the washer hose or a mesh filter helps. A slow standpipe can be snaked gently from the top, but a standpipe that overflows during the spin cycle needs a closer look. In the spring thaw or after heavy rain, a main line can run slow when the ground is soaked, which makes basement drains the first place trouble appears. A sewer camera inspection shows what is happening beyond your reach.
- Floor drain: refill the trapA quart of water every few months keeps the seal.
- Floor drain: backs upLikely the main line; stop using water and call.
- Standpipe: lintFit a mesh filter on the washer hose.
- Standpipe: overflowsSlow main or branch line; do not run another load.
- Spring thawHeavy runoff can slow the sewer; watch the basement.
Home remedies and shortcuts to leave alone
The wrong fix can turn a small clog into a repair. These are the usual traps.
| Shortcut | Problem | Do this instead |
|---|---|---|
| Pouring a strong chemical cleaner | Can burn skin, damage pipe and hurt anyone who opens the line later | Plunger, then auger |
| Mixing two cleaners | Can release toxic fumes | Never combine |
| Boiling water into a toilet or porcelain | Can crack the fixture; may soften plastic pipe | Hot tap water only |
| Pushing a wire coat hanger down | Scratches pipes and snags | Use a proper auger |
| Plunging after a chemical cleaner went in | Splashes harsh liquid back at you | Stop and call, naming the product |
| Flushing wipes labeled flushable | They do not break up like paper | Bin them |
| Pouring grease down the sink | Cools and sticks to pipe walls | Wipe pans into the trash |
If a chemical cleaner is already in the drain
Do not plunge or snake it, because the liquid can splash. Wear gloves and glasses, keep the area ventilated, and tell the plumber exactly what product went in when you call.
When learning how to unclog a drain turns into calling for help
A clog you can clear in ten minutes is a DIY job. A clog that survives two honest attempts is not.
Stop points
Stop when more than one fixture is affected, when sewage or gurgling shows up at a floor drain, when the clog returns within days, or when you find yourself reaching for stronger chemicals. At that point you are guessing about what is in the line, and a camera or a power cleaner is a better answer than force.
Before calling, note which fixtures are slow, when it started, and whether anything unusual went down the drain. That short description lets the person on the phone judge how urgent it is. Do not run the dishwasher or washer while you wait, since that sends more water into a line that may already be full.
The drain cleaning page covers the tools a plumber uses. Sewer-line problems, such as roots or a collapsed section, go to sewer line repair. Same-day service is available and a person answers at any hour.
| Situation | DIY? | Next step |
|---|---|---|
| Single slow sink | Yes | Plunger, trap, auger |
| Single toilet | Yes | Flange plunger, toilet auger |
| Two or more fixtures slow | Limited | One honest try, then call |
| Floor drain or lowest fixture backs up | No | Stop water, call |
| Recurring clog | No | Call; camera and cleaning |
When to call a plumber for a clogged drain
Put the tools down and call if you see any of these.
More than one fixture is slow
A shared branch or the main is probably blocked.
Water backs up in a floor drain or shower
Likely a main-line problem. Stop using water.
The clog keeps coming back
A camera or power cleaning is the next step.
Sewage smell or standing water
Keep people away and call.
Drain help in Lakeville
Drain cleaning
Cable and power-cleaning tools beyond a homeowner’s reach.
Drain cleaning details →Clogged drain
Fast help for a drain that will not clear.
Clogged drain details →Hydro jetting
High-pressure scouring of pipe walls.
Hydro jetting details →Sewer camera inspection
See the cause inside the line.
Sewer camera inspection details →Questions about how to unclog a drain
Is there a safe way to learn how to unclog a drain at home?
Does baking soda and vinegar unclog a drain?
Is it safe to use chemical drain cleaner?
How do I unclog a kitchen sink with a garbage disposal?
Why does my drain keep clogging in the same place?
How do I unclog a basement floor drain?
How do I unclog a drain when the whole house is slow?
How much does it cost to unclog a drain?
Can tree roots block my drain?
Can I get a plumber for a clogged drain tonight?
More guides for drains and plumbing trouble
Drain still not moving?
Call any time. A person answers, and same-day service is available.