How to Fix a Kitchen Sink Drain (DIY or Call a Plumber)

You turn on the faucet. Water rises instead of draining. Your kitchen sink has become a giant bowl of dirty water, and you've got dishes to wash.

A non-draining kitchen sink is one of the most common household plumbing problems. The good news: most clogs are fixable with tools and methods you already have at home. This guide covers everything from quick fixes to professional solutions.

Diagnosing Your Kitchen Sink Drain Problem

Before you start fixing, understand what you're dealing with:

Completely Clogged

Water sits in the basin and won't drain at all. This means the blockage is solid—usually grease that has hardened or food debris that has packed together.

Slow Draining

Water drains, but slowly. This indicates a partial blockage—usually buildup on pipe walls that's restricting flow. Slow drains get worse over time if not addressed.

Gurgling or Bubbling

Strange sounds from the drain when water runs. This means air is being trapped by a partial clog. The water forces air bubbles through, creating gurgling noises.

Drains But Comes Back

Water drains, then slowly fills the basin again even without use. This indicates a deeper issue—either a severe blockage further down the line or a venting problem.

Smells Bad

A sewage smell from the kitchen drain usually means the P-trap has run dry (allowing sewer gas in) or there's rotting debris trapped in the pipes.

How to Fix a Kitchen Sink Drain

Work through these methods in order. Each one targets a different type of blockage.

Step 1: Check the Strainer Basket

Best for: Visible debris clogs

Time: 2 minutes

1. Remove the sink strainer or stopper
2. Pull out any visible debris caught on top
3. Rinse the strainer thoroughly
4. Check the drain opening for buildup
5. Run water to test

Simple, but many clogs start here.

Step 2: Boiling Water

Best for: Fresh grease clogs

Time: 5 minutes

1. Boil a full kettle of water
2. Slowly pour half into the drain
3. Wait 30 seconds
4. Pour the rest
5. Check if water drains freely

Note: Use very hot tap water instead of boiling if you have PVC pipes.

Step 3: Dish Soap + Hot Water Treatment

Best for: Grease-related blockages

Time: 10 minutes

1. Add 2–3 tablespoons of dish soap to the drain
2. Run the hottest water for 1 minute
3. Let sit for 5 minutes
4. Flush with more hot water
5. Check if drainage improved

Step 4: Plunge the Drain

Best for: Standing water with solid blockage

Time: 10–15 minutes

1. Fill the sink with 2–3 inches of water
2. Use a cup plunger (flat bottom, not a toilet plunger)
3. Block the overflow hole with a wet rag
4. For double sinks, block the second basin with a cloth
5. If you have a disposal, block the disposal opening
6. Plunge firmly for 20–30 strokes
7. Pull up sharply to break the seal
8. Run water to check

Step 5: Clean the P-Trap

Best for: Clogs that survive plunging

Time: 20–30 minutes

1. Put a bucket under the P-trap
2. Loosen the slip nuts on both ends
3. Remove the trap and empty water/debris
4. Scrub the inside with a bottle brush and dish soap
5. Check the wall pipe with a flashlight
6. Reassemble hand-tight
7. Run water and check for leaks

Step 6: Use a Drain Snake

Best for: Blockages beyond the P-trap

Time: 20–30 minutes

1. Remove the P-trap first
2. Insert the drain snake into the wall pipe
3. Feed the cable while turning clockwise
4. When you feel resistance, work through it
5. Pull out the snake and wipe debris
6. Repeat until the pipe feels clear
7. Reassemble the P-trap
8. Flush with hot water

For stubborn or deep blockages, our technicians use professional-grade motorized snakes and hydro jetting equipment that clears the entire drain line. Call for a free estimate.

How to Fix Specific Kitchen Sink Drain Problems

If Your Garbage Disposal is Clogged

1. Turn off the disposal and unplug it
2. Press the reset button on the bottom
3. If humming, use the hex wrench underneath to free the impeller
4. Use tongs (never your hands) to remove debris
5. Turn on and test

If Your Double Sink Has One Side Clogged

1. Block the good side completely with a wet cloth
2. Plunge the clogged side with the overflow blocked
3. If that fails, remove and clean the P-trap
4. The clog is likely at the tee fitting where both lines meet

If Your Drain Smells Bad

1. Run hot water for 30 seconds
2. Pour 1/2 cup baking soda down the drain
3. Add 1/2 cup white vinegar
4. Wait 10 minutes
5. Flush with boiling water
6. If smell persists, the P-trap may be empty or there's deeper debris

When to Call a Plumber for Your Kitchen Sink

Get professional help if:

• All six methods have been tried without success
• The clog clears but returns within weeks
• Other drains in the house are affected
• You hear gurgling from other fixtures
• Water backs up into the dishwasher
• There's a persistent sewage smell
• You suspect a more serious plumbing issue

Professional drain cleaning uses camera inspection and hydro jetting to fully diagnose and resolve persistent problems. Emergency plumbing service is available 24/7.

Cost to Fix a Kitchen Sink Drain

Service	Cost	Notes
DIY (water, soap, plunging)	$0–$20	If you own a plunger
Drain snake (hardware store)	$25–$50	One-time purchase
Professional P-trap cleaning	$85–$150	Most common professional fix
Drain snaking (deeper clog)	$150–$300	Motorized equipment, 30–50 ft reach
Hydro jetting	$300–$600	Complete pipe cleaning
Camera inspection	$100–$250	For hidden or recurring issues

How to Prevent Kitchen Sink Drain Problems

• Use a strainer—catches food before it enters the drain
• Never pour grease down the drain
• Scrape plates before rinsing
• Run hot water after each use
• Weekly: Dish soap + hot water flush
• Monthly: Baking soda + vinegar + boiling water
• Never put fibrous foods in the garbage disposal

Frequently Asked Questions