How to unclog a drain

Find where the clog sits, then use the right tool in the right order.

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On this page
  1. Clog finder
  2. Where clogs sit
  3. The kit
  4. Before you start
  5. Plunge it
  6. Pull out hair
  7. Clean the trap
  8. Use a drum cable
  9. Kitchen sinks
  10. Hot water and cleaners
  11. Is it the main line?
  12. Mistakes
  13. Call a plumber
  14. Keep it clear
  15. FAQ
  16. How I wrote it

Quick answer

In a shower, tub or bathroom sink, pull the hair out first with a hair tool. Then plunge with a sink plunger, the overflow covered. If neither works, the clog is past the trap: clean the trap or feed a 1/4 in. drum cable.

Korky Beehive Mini sink and drain plunger with black T-handle
First tool for sinks, tubs and showers: Korky Beehive Mini$23.96 at AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
Check it on Amazon

Where is your clog, and what do you try first?

Pick the drain and what it’s doing. The finder gives the likely spot and the order to work in.

Likely spot: the stopper and the tailpiece under it.

First: pull the stopper and clean it, then run the hair tool down the drain. Next: plunge with the overflow hole covered. Then pull the trap. Last: a 1/4 in. cable.

The finder is my order of attack, built on the makers’ steps further down. Stop at the first step that clears the drain.

The order matters more than the tool. A plunger and a hair tool cost little and take minutes. Pulling a trap means a bucket and some mess. A drum cable is the last homeowner step, because it reaches past the trap where the first three can’t.

Toilets are their own job, with their own plunger and auger: see how to unclog a toilet. A sink that’s slow but not stopped has its own guide too: slow-draining sink.

Where a clog sits under a sink

Almost every fixture drains the same way: a short drop, a U-shaped trap that holds water, and an arm into the wall.

1 2 3 1 Stopper and tailpiece Hair, soap and toothpaste. Plunger or hair tool. 2 Trap Grease, food and dropped things. Pull the trap. 3 Trap arm and wall Past the trap. Feed a drum cable. Water seal 2 to 4 in. IPC 2024 section 1002.4. Keeps sewer gas out. 1 2 3 1 Stopper and tailpiece Hair, soap and toothpaste. Plunger or hair tool. 2 Trap Grease, food and dropped things. Pull the trap. 3 Trap arm and wall Past the trap. Feed a drum cable. Water seal 2 to 4 in. IPC 2024 section 1002.4. Keeps sewer gas out.
Side view, not to scale. The trap holds a water seal of 2 to 4 inches, which the 2024 International Plumbing Code (section 1002.4) requires so sewer gas stays out of the room. Clogs build where the water slows: at the stopper, in the trap and along the arm.
FixtureSmallest trap (IPC Table 709.1)What usually clogs it
Bathroom sink (lavatory)1-1/4 in.Hair, soap and toothpaste at the stopper
Shower, up to 5.7 gpm1-1/2 in.Hair and soap at the strainer
Bathtub1-1/2 in.Hair on the stopper linkage
Kitchen sink, with or without a disposal or dishwasher1-1/2 in.Grease and food in the trap and arm

Those sizes matter for the cable. RIDGID rates the Power Spin for lines up to 1-1/2 in., so every trap in the table is inside its range. A bathroom sink’s 1-1/4 in. trap is the tightest, and it’s also where the hair tool does most of the work.

The code also limits the drop from the fixture to the trap to 24 inches. That’s why most clogs you can reach are within arm’s length of the fixture: the trap is right there under it. If the trap size by fixture is new to you, that guide has the full table.

A sink plunger, a hair tool and a drum cable

Three tools cover almost every sink, shower and tub clog. I’ve used every tool in this kit.

Korky Beehive Mini sink and drain plunger with black T-handle
Best for sinks, tubs and showers

Korky Beehive Mini 94-4A

$23.96 at Amazon
Check it on Amazon
Price as of Oct 24, 2026, 5:30 AM EDT
FlexiSnake Drain Weasel spinning handle with micro-hook wands
Best for hair in shower and sink drains

FlexiSnake Drain Weasel

$19.99 at Amazon
Check it on Amazon
Price as of Oct 24, 2026, 5:30 AM EDT
RIDGID Power Spin 41408 drum auger with AUTOFEED trigger
Best for clogs past the trap

RIDGID Power Spin 41408

$70.99 at Amazon
Check it on Amazon
Price as of Oct 24, 2026, 5:30 AM EDT
ToolKey specsPick it ifSkip it if
Korky 94-4A Beehive Mini5.5 in. cup, 9 in. T-handle, non-marking rubber, made in the USA. This listing is a 2-packYou need a plunger that seals on a flat sink, tub or shower drain.It’s a toilet. A sink cup won’t seal in a bowl; use a flanged toilet plunger.
FlexiSnake Drain Weasel DWPSK5A18 in. micro-hook wands on a spinning handle, wands snap in and outHair is the problem: a shower, tub or bathroom sink that slowed over weeks.It’s a kitchen sink. Grease and food don’t hook.
RIDGID Power Spin 414081/4 in. × 25 ft MAXCORE cable, lines up to 1-1/2 in., hand crank or drill at 500 rpm maxThe plunger and trap didn’t clear it, and the clog is in the arm or wall.It’s a toilet. RIDGID says the Power Spin isn’t recommended for toilets.

Two notes from the listings. Korky’s page lists 94-4A as an alternate part number for the 94-4 Beehive Mini, and this listing sells two, which is handy with one for the kitchen and one for the bathroom. Amazon’s Drain Weasel listing says five refill wands, while the maker’s page for the same DWPSK5A kit says six. Count what arrives.

The RIDGID listing calls the Power Spin a toilet auger. RIDGID’s own manual says it’s made for sinks, tubs and showers and is not recommended for toilets, so I go by the manual. For a toilet, the toilet auger vs drain snake guide covers the right tool.

Other things you’ll want on hand: a bucket, rags, an old toothbrush, rubber or leather gloves, safety glasses and a flashlight. Channel locks help on a stubborn slip nut, but most come off by hand.

Steps that are the same on every drain

  1. 1
    Stop running water into it

    Every extra gallon is water you’ll have to bail out or catch in a bucket.

  2. 2
    Find out what’s already in the drain

    If anyone poured a chemical cleaner in, don’t plunge. Drano’s label says never use a plunger during or after use, because the cleaner may still be there.

  3. 3
    Glasses and gloves on

    RIDGID’s manual calls for safety glasses and gloves, because drains can hold chemicals and bacteria.

  4. 4
    Clear the cabinet

    Empty it and set a bucket and rags under the trap before you touch anything.

  5. 5
    Light the drain

    A flashlight down the drain often shows hair or a lost cap you can just pull out.

That chemical step is the one that hurts people. A plunger stroke can push a cleaner back up out of the drain and onto your hands or face. If a cleaner is in there and the drain is still stopped, let the water sit, ventilate the room and read the product’s label before doing anything else.

How to plunge a sink, tub or shower

From Korky’s instruction sheet for the Beehive Mini. The covers are what most people skip.

  1. 1
    Cover the other openings

    Korky says to put a wet rag over the sink overflow, the dishwasher vent and the other side of a double sink. Air escaping through any of them takes the push with it.

  2. 2
    Add water

    There should be enough water in the sink to cover the base of the plunger.

  3. 3
    Fill the cup with water

    Tip the plunger in at an angle so the head fills with water, then set it flat over the drain.

  4. 4
    Pulse it

    Pump in an even up-and-down motion for 10 to 15 seconds, then break the seal.

  5. 5
    Repeat

    Do it again until the water drains.

  6. 6
    Run hot water

    Once it’s clear, run hot tap water to carry the loose debris away.

Why water and not air: water doesn’t compress, so each stroke moves the clog. A cup full of air mostly squeezes the air. That’s why Korky has you tip the cup in to fill it.

On a tub, the overflow is the round plate under the faucet. Hold a wet rag over it with your free hand, or have someone press it. On a shower, the drain usually has no overflow, so you only need to cover a second drain if there is one.

My call: give it three rounds. If the water hasn’t moved after three honest tries, the clog isn’t one a plunger will push, and the next step will get further.

Pull hair out of a shower or bathroom sink

Hair doesn’t dissolve in water and it doesn’t push well either. You pull it out.

  1. 1
    Get the stopper out

    On a bathroom sink, loosen the pivot nut behind the drain and pull the rod, then lift the stopper. RIDGID’s manual shows the same step: remove the lift rod and drain plug.

  2. 2
    Clean the stopper

    Most of the hair is wrapped on it. Pull it off and rinse it.

  3. 3
    Lift the strainer

    On a shower, the strainer pops out or comes off with one or two screws.

  4. 4
    Feed the hair tool down

    Push the wand in, spin the handle so the hooks catch, then pull straight up.

  5. 5
    Repeat with a clean wand

    Keep going until a pass comes up clean.

  6. 6
    Flush with hot tap water

    Then put the stopper or strainer back.

Drain Weasel steps from the maker: insert the wand, spin the handle, pull out the hair and throw the wand away
The maker’s three steps for the Drain Weasel: insert, spin, remove. A used wand snaps off the handle and goes in the trash. Listing photo: Amazon.

The Drain Weasel’s wands are thin and flexible on purpose. They follow the bend under a shower drain where a straight rod stops. The maker sells refill packs, because a wand full of hair is easier to throw out than to clean.

If the stopper itself won’t lift or close, that’s a separate fix: bathroom sink stopper not working. To stop the hair before it gets in, the shower drain size and hair catcher fit guide matches a catcher to your drain.

Pull the trap and clean it

Under a sink, the trap is held by two slip nuts. If the clog is in the trap, this clears it for sure.

  1. 1
    Bucket under the trap

    It’s full of water, and anything above it comes down too.

  2. 2
    Loosen both slip nuts

    Turn them by hand, counterclockwise as you look from below. Use channel locks only if they won’t budge.

  3. 3
    Drop the trap

    Lower it into the bucket and look inside. Grease, food, hair or a lost ring usually comes out here.

  4. 4
    Check the arm

    Look into the arm toward the wall with a flashlight. If you see the clog, it’s past the trap: go to the cable.

  5. 5
    Clean the washers

    Each slip joint seals on a plastic or rubber washer. Wipe it clean, seat it flat and replace any that’s cracked.

  6. 6
    Put it back and test

    Hand-tighten the nuts, run water for a minute and feel every joint for drips.

The code allows slip joints only at the trap’s inlet, outlet and within the seal, and they have to seal on a gasket (IPC 2024 section 1002.2). That gasket is what keeps the joint dry. A nut cranked down hard on a crooked washer leaks; a washer seated flat seals hand-tight.

The trap has to refill with water before you’re done. That water seal is what stops sewer gas from coming into the room. Running the tap for a minute does it.

Some older houses have metal traps, which can be thin with age. If a slip nut won’t turn by hand, hold the trap steady while you turn it so you don’t twist the pipe in the wall.

Run a drum cable past the trap

From RIDGID’s Power Spin operator’s manual. Go slow: a cable that’s forced kinks or breaks.

  1. 1
    Pick your access point

    On a sink, take the stopper out or pull the trap. On a tub, take off the overflow plate, never the drain. On many showers, the cable fits through the strainer’s cross bars.

  2. 2
    Set the tool close

    RIDGID says to keep the drum within 4 inches of the drain so the cable has support.

  3. 3
    Feed the cable

    Pull the AUTOFEED trigger and turn the drum clockwise. With a drill, use a low speed under 500 rpm.

  4. 4
    Don’t force it

    If the cable stops turning, stop. Back it off a little, then feed again.

  5. 5
    Pull it back out

    Stop turning before the cable tip leaves the drain, so it doesn’t whip.

  6. 6
    Flush and clean

    Run water down the drain. RIDGID says to flush the cable, drum and AUTOFEED with water after every use.

The tub rule is worth a second look. RIDGID says going through a tub drain will damage the cable. The overflow opening gives the cable a straight shot down to the tub’s trap.

RIDGID rates the Power Spin for up to 25 feet of line up to 1-1/2 in. That covers the run from a fixture to the branch in the wall. A clog further out, in a 3 in. or 4 in. line, is a job for a bigger machine; the drain cleaning machine guide covers those. For the difference between cable types, see types of drain snakes.

Kitchen sinks, disposals and double bowls

A kitchen clog is usually grease and food, and the double bowl gives the push a way out.

Set-upBefore you plungeWatch out for
Double bowlPlug or hold a wet rag over the other drainThe push goes up the other side if it’s open
Dishwasher hooked to the sinkCover the dishwasher vent on the deck, as Korky’s sheet saysDirty water forced back toward the dishwasher
Disposal on one sidePlunge with the disposal side coveredNever run the disposal with a chemical cleaner in it; Drano says it can splash back
Single bowlMake sure there’s water over the drainGrease in the arm, past the trap

Korky’s Beehive Mini is listed for sinks with or without garbage disposals. If the disposal itself hums or won’t turn, that’s a disposal problem first: garbage disposal not working. If the dishwasher is the one leaving water behind, see dishwasher not draining.

My call on grease: it goes in the trash, not the drain. Hot grease runs down fine and sets up cool in the trap and arm, and that’s where kitchen cables keep finding it.

Hot water, baking soda and drain cleaners

What the pipe maker and the cleaner’s own label say, before you pour anything.

What people pourWhat the source saysMy call
Boiling waterCharlotte Pipe rates ABS and PVC to 140°F; Drano says flush with hot, not boiling, waterHot tap water only. Most house drains today are plastic
Hot tap waterKorky’s sheet ends with running hot water after the clog clearsGood for flushing loose debris after the clog is gone
Gel drain cleanerDrano: 16 oz, wait 15 to 30 minutes, never plunge during or after, not in toiletsA slow drain only, never a stopped one you might plunge
Mixing two cleanersDrano: don’t mix with other cleaners or chemicals; hazardous fumes or a violent reaction can resultNever
Baking soda and vinegarNo maker rating foundFine for a smell, but I don’t count on it for a real clog

The 140°F figure is in Charlotte Pipe’s plastics technical manual as the maximum operating temperature for ABS and PVC. Boiling water is 212°F at sea level, well over that. On an old cast iron or galvanized drain, heat isn’t the worry, but the plastic trap under the sink usually is plastic anyway.

Chemical cleaners have a place on a slow drain you won’t be opening. For which ones work and how they differ, see the best drain cleaners, does Drano work and enzyme vs chemical drain cleaner.

When it’s more than one drain

One slow fixture is a fixture clog. Two or more at once points downstream, and the homeowner tools stop there.

What you seeWhere it likely isNext step
One sink, tub or shower is slowThat fixture’s stopper, trap or armThe steps above
Tub gurgles when the sink next to it drainsThe branch the two shareCable from the sink; if it doesn’t clear, call a plumber
Water comes up in the tub when the toilet flushesThe main drain or the bathroom branchStop using water and call a plumber
Every drain on the lowest floor is slowThe building drain or sewerFind the main cleanout; this is past a 1/4 in. cable

A small cable fed from a sink won’t reach or turn a clog in a 3 in. or 4 in. main. The clogged drain vs main line guide walks through the signs, drain cleanout locations shows where the access is, and cost to unclog a main drain gives price ranges.

What makes a clog worse

MistakeWhat happens
Plunging with the overflow openThe push escapes up the overflow and the clog doesn’t move
Plunging after a chemical cleanerDrano says never; the cleaner can come back up at you
Pouring boiling water into a plastic drainOver the 140°F rating Charlotte Pipe gives ABS and PVC
Feeding a cable down a tub drainRIDGID says it damages the cable; use the overflow
Running a drill fast on a drum cableRIDGID limits the Power Spin to 500 rpm
Cranking slip nuts tight on a crooked washerThe trap leaks under the cabinet
Using a sink plunger on a toiletIt can’t seal in the bowl’s outlet

When to call a licensed plumber

More than one drain is backing up

That’s past the fixture. Stop using water until it’s cleared.

A cleaner is sitting in a stopped drain

Don’t plunge or open the trap. Tell the plumber what was poured in.

The cable stops and won’t turn

Don’t force it. A stuck cable can kink, and pipes in poor shape can be damaged.

It keeps coming back

The same clog every few weeks often means a problem further down the line.

RIDGID’s manual says piping in poor condition may be damaged by drain cleaning, and suggests a camera to check it. That’s a plumber’s tool. If you’d rather hand off the whole job, the plumbing cost estimator gives a range for your area.

Keep the drain from clogging again

DrainWhat to do
Shower and tubFit a hair catcher and empty it after showers
Bathroom sinkPull and rinse the stopper every few months
Kitchen sinkScrape plates into the trash and keep grease out of the drain
Any drain after a clearRun hot tap water for a minute to carry the loose bits away

A hair catcher does more than any cleaner, because it stops the hair before it reaches the trap. Keep the plunger under the sink where you’ll find it, so the first slow drain gets plunged before it becomes a stopped one.

Questions people ask

What is the fastest way to unclog a drain?

A sink plunger with the overflow covered and enough water to cover the cup. If it’s hair in a shower or bathroom sink, a hair tool is just as fast. Both take a few minutes.

How do you unblock a badly blocked drain?

Work in order: plunge, pull the trap and clean it, then run a 1/4 in. drum cable into the arm. If water comes up in another drain, stop: the clog is in the main line.

What dissolves hair in a drain?

Pulling it out works better than dissolving it. A hair tool with small hooks lifts it out of a shower or sink drain in a pass or two. Chemical gels are sold for hair, but Drano’s label says never to plunge during or after using them.

What do plumbers use instead of Drano?

A plunger, a hair tool for hair clogs and a drum cable for clogs past the trap. For a main line, a bigger machine and a camera.

Can boiling water unclog a drain?

Not safely on plastic pipe. Charlotte Pipe rates ABS and PVC to 140°F, and boiling water is 212°F. Even Drano says to flush with hot, not boiling, water. Use hot tap water.

Can I plunge a drain after using Drano?

No. Drano’s label says never to use a plunger during or after use, because the cleaner may still be in the drain if it didn’t clear.

How do I unclog a shower drain with standing water?

Lift the strainer and pull the hair out with a hair tool. If the water still stands, plunge it with any second drain covered. If that fails, feed a 1/4 in. cable through the strainer.

How I put this together

Why trust me

I’m Isaac Daniels, a licensed journeyman plumber in Georgia (license #JP507711). I’ve used every tool in the kit. The steps and numbers come from Korky, RIDGID, Drano and Charlotte Pipe documents and the 2024 International Plumbing Code, read on Oct 22, 2026.

How I pick

  • One tool for each step: plunge, pull hair, run a cable.
  • Real brands with maker documents that match the listing’s model number.
  • New and in stock on Amazon on the day of the update.
  • No scores: each tool does a different job, so they’re listed as a kit.
  • Prices come from Amazon’s API with the time they were read.

Sources

  • Korky (Lavelle Industries), “BEEHIVE Mini Sink & Drain Plunger,” part 94-4, and “How to Plunge a Sink” instruction sheet 94-4A (korky.com).
  • Korky, warranty table (korky.com/support/warranty).
  • FlexiSnake Drain Weasel, “Snake Kit – 5 Pack,” SKU DWPSK5A (drainweasel.com).
  • RIDGID, Power-Spin Drain Cleaner operator’s manual, 999-999-436.10 Rev. A.
  • SC Johnson, Drano Max Gel Clog Remover directions and precautions (drano.com).
  • Charlotte Pipe and Foundry, Plastics Technical Manual TM-PL, maximum operating temperatures.
  • International Code Council, 2024 International Plumbing Code, Table 709.1 and sections 1002.1, 1002.2 and 1002.4.

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