A slow-draining sink, water pooling in the shower, or a gurgling toilet are all common signs of a blocked drain. The good news is, these are some of the most common blocked drains we fix across Townsville, and a good number of them can be cleared with the right DIY approach.

In this guide, we’ll cover what you can safely fix yourself, what you shouldn’t attempt, and the right approach for the specific drain you’re dealing with, so you don’t turn a simple blockage into a bigger, more expensive plumbing repair.

TL;DR

• Identify the blockage type first. Slow draining = partial blockage, DIY-friendly. No draining, backing up, or multiple fixtures affected = call a plumber.
  
• Prep safely. Wear gloves, clear visible debris by hand, use hot tap water (not boiling), and never mix chemical cleaners.
  
• Work through DIY methods in order: hot water flush → baking soda and vinegar → plunger → hooked wire/drain snake → remove and clean the P-trap → clear outdoor drains → wet/dry vacuum (toilets only).
  
• Avoid chemical drain cleaners, bleach, forcing wire hangers into pipes, and pouring any chemicals into stormwater drains.
  
• Call a licensed plumber if: the blockage keeps returning, multiple fixtures are affected, or nothing shifts it, this often signals tree root intrusion, pipe damage, or a collapsed pipe needing a CCTV inspection.

Before You Try Any of the Methods Below

• Identify the blockage you’re dealing with: If it’s draining slowly, even if it’s taking a while, the methods below should sort you out. But if water’s not moving at all, backing up into another fixture, or a few drains are playing up at once, you’re likely looking at something further down the line, and that’s a job for a plumber, not a plunger.
  
• Gloves on, then clear what you can see: Drains carry bacteria, food waste, and soap residue, so gloves come first. Then pop the cover or stopper off and pull out anything visible by hand, hair, and soap scum sitting right at the opening account for a lot of bathroom blockages, and clearing it now stops debris getting pushed further down if you move on to another method.

6 Ways to Clear a Blocked Drain on Your Own

The methods below are arranged from the simplest to the most involved. Start with the first method and work your way down only if needed. This helps reduce the risk of damaging your pipes while giving you the best chance of clearing a minor drain blockage yourself.

1. Flush the Drain with Hot Water

This is the first thing worth trying if water’s still draining, but slowly. It works well on grease and soap residue, though it won’t do anything for a hair clog that needs physically pulling out.

Works for: kitchen sink, bathroom sink, shower or bath, laundry drain

Things you’ll need:

• Hot tap water (not boiling)

How to do it:

1. Remove any standing water from the sink, shower, or floor waste if possible.
2. Slowly pour a steady stream of very hot tap water down the drain. Avoid using boiling water, especially if your home has PVC pipes.
3. Wait about one minute.
4. Run the tap to check whether the water is draining more freely.
5. Repeat once or twice if the flow has improved but hasn’t fully returned to normal.

2. Break Down Build-Up with Baking Soda and Vinegar 

If hot water alone didn’t fully clear it, this is the next step up. The fizzing reaction helps break down soap scum and light organic build-up, but like the hot water flush, it won’t help dislodge a solid hair clog or a foreign object stuck in the pipe.

Works for: kitchen sink, bathroom sink, shower or bath, laundry drain

Things you’ll need:

• ½ cup baking soda
• 1 cup white vinegar
• Drain plug or stopper

How to do it:

1. Pour the baking soda directly into the drain.
2. Follow immediately with the white vinegar.
3. Cover the drain with the stopper or plug straight away. This keeps the fizzing reaction inside the pipe instead of allowing it to escape through the drain opening.
4. Leave it for 10 to 15 minutes.
5. Flush the drain with hot tap water and check whether the water is draining more freely.

PS: At this point, you might be tempted to reach for a chemical drain cleaner, so if you do use one, follow the manufacturer’s instructions exactly. If it doesn’t clear the blockage, don’t try to force it by increasing the concentration, leaving it in longer than recommended, or mixing in another cleaner, that can harm you, damage the pipe, and make it unsafe for a plumber to work on later.

3. Dislodge the Blockage with a Plunger 

If the fizzing didn’t help, you’re likely dealing with something sitting in the drain and that’s where a plunger can help. Just make sure you’re using the right one for the job. 

For sinks, showers, and baths, use a flat-cup plunger, or an accordion plunger if you need a stronger grip. For toilets, use a flanged plunger, the one with the extra rubber lip, which is built to seal in the bowl and won’t work properly on anything else.

Works for: kitchen sink, bathroom sink, shower or bath, toilet

Things you’ll need: 

• Flat-cup plunger (for sinks, showers, and baths) or flanged plunger (for toilets)
• Wet cloth or rag

How to do it (for sinks, showers, and baths)

1. Block any overflow opening or second drain with a wet cloth so you get an airtight seal, since air escaping through it will kill your suction.
2. Make sure there’s enough water in the sink or tub to fully cover the plunger cup. Add some if there isn’t.
3. Position the plunger fully over the drain opening and press down gently first to push out the air, rather than slamming it down.
4. Pump firmly 10-15 times in short, sharp strokes, keeping the seal intact the whole time.
5. Break the seal on the last pull, lift the plunger, and check the flow. Give it one more go if needed.

How to do it (for toilets)

1. Fold the flange out from inside the cup if it isn’t already, so it can sit down into the toilet’s outlet.
2. Ease the plunger into the bowl at an angle first to let water fill the cup, rather than dropping it straight in and trapping air.
3. Once it’s sealed over the outlet, plunge with steady, firm strokes, keeping the seal unbroken until the last one.
4. Flush to test. If water rises alarmingly high, stop pumping and let it settle before trying again.

4. Remove the Blockage with a Hooked Wire or Drain Snake

If plunging didn’t get things moving, you’re likely dealing with hair wrapped around the pipe wall or snagged at the trap. A hooked wire or drain snake will help grab and pull that clump out but you’ll need to be careful with how much force you apply. If you hit firm resistance and keep pushing, you risk cracking an old trap, scratching the pipe, or shoving the clog further in where it’s harder to reach. 

Works for: bathroom sink, shower or bath drain

Option A: Hooked Wire

Things you’ll need:

• Wire coat hanger
• Pliers
• Gloves
• Rubbish bag or bucket
• Screwdriver (if needed to remove the drain cover)

How to do it:

1. Remove the drain cover or strainer.
2. Straighten the coat hanger and use the pliers to bend a small hook on one end.
3. Feed the hooked end slowly into the drain.
4. Twist the wire gently until it catches the hair. 
5. Slowly pull the wire back out and place the debris straight into a rubbish bag or bucket.
6. Repeat until no more debris comes out, then flush the drain with hot tap water.

Option B: Drain Snake

Things you’ll need:

• Hand drain snake
• Gloves
• Rubbish bag or bucket
• Screwdriver (if needed to remove the drain cover)

How to do it:

1. Remove the drain cover or strainer.
2. Unlock the drain snake and feed the cable slowly into the drain.
3. Lock the cable in place, then rotate the handle until the snake grips the blockage.
4. Slowly pull the snake back out and remove the hair or debris.
5. Place the debris into a rubbish bag or bucket.
6. Repeat if needed, then flush the drain with hot tap water.

5. Remove and Clean the P-Trap (U-Bend)

If you’ve tried everything above and it’s still blocked, the clog is probably sitting inside the U-bend itself, right where a plunger or wire can’t quite reach it. So your only option is to take the pipe off and clean it out by hand – which takes more effort than the earlier steps, but it puts you directly at the spot where the blockage is stuck. 

Works for: kitchen and bathroom sink

Things you’ll need:

• Bucket
• Old towel or cloth
• Adjustable pliers (if needed)
• Rubber gloves

How to do it:

1. Place a bucket and towel underneath the P-trap (the U-shaped pipe beneath the sink) to catch any water.
2. Loosen the slip nuts by hand. If they’re too tight, use adjustable pliers carefully.
3. Remove the P-trap and empty the contents into the bucket.
4. Clear out any debris or build-up, then rinse the trap thoroughly.
5. Reattach the P-trap, hand-tightening the slip nuts first, then giving them a quarter turn with the pliers if needed. Avoid overtightening as it can crack the plastic fitting or leave a washer sitting crooked.
6. Run water through the sink and check each connection with a paper towel to ensure there are no leaks around the fittings.

6. Clear Surface Debris from Outdoor Drains

This one covers a different situation: water pooling around an outdoor grate or stormwater drain, with leaves, dirt, or debris visible on top of it. 

Works for: outdoor stormwater grates

Things you’ll need:

• Rubber gloves
• Bucket or rubbish bag
• Garden hose

How to do it:

1. Put on gloves and remove any leaves, silt, dirt, or other debris covering the grate.
2. Lift the grate if it comes free and check the leaf basket or sediment trap underneath.
3. Dispose of the debris so it doesn’t wash back into the drain.
4. Flush the drain with a garden hose to check whether the water is flowing away properly.
5. Continue clearing any remaining surface debris until the water drains freely.

A little tip: Townsville’s wet season pushes leaves and dirt into outdoor grates fast, so it’s worth checking them regularly during heavy rain. And if the grate’s clear but water is still pooling, that’s a sign the blockage is further down the pipe – you’ll need to call a plumber to inspect and fix it. 

7. Extract the Blockage Use a Wet/Dry Vacuum

If you don’t have a plunger on hand, a wet/dry vacuum is a solid alternative for a stubborn blockage. It can pull the obstruction back up toward the opening, which makes it much easier to remove by hand afterward. It’s best suited to softer blockages like paper, hair, or organic matter, and won’t do much against anything solid or lodged deep in the system. 

Works for: toilets, kitchen sinks, bathroom sinks, bathtubs, showers

Things you’ll need:

• Wet/dry vacuum that is designed to vacuum liquids
• Correct wet filter (if required by the manufacturer)
• Rubber gloves

How to do it:

1. Set the vacuum to liquid mode and fit the correct filter if your model requires one.
2. Position the hose firmly over the drain opening or toilet outlet to create the best seal possible.
3. Turn the vacuum on and let it run for several seconds to draw the blockage back towards the hose.
4. Remove the hose and test the drain by flushing the toilet or running water to see if the blockage has cleared.
5. Clean and disinfect the vacuum thoroughly according to the manufacturer’s instructions before storing it.

One important caution here: Never use a wet/dry vacuum if you’ve recently poured a commercial chemical drain cleaner into the drain. The vacuum could spray all those chemicals back towards you. 

Final Thoughts

Even if you’ve managed to clear the blockage, it’s not always a permanent fix. If the same drain keeps blocking after you’ve cleared it, or more than one fixture is affected at once, the problem is usually deeper within the drainage system. It could be anything between a tree root intrusion, or severe pipe damage – which are all structural issues that none of the DIY methods in this guide will fix.

That’s where a professional inspection makes all the difference. At 1Touch Plumbing, we use CCTV drain inspections to identify the actual cause of recurring blocked drains, allowing us to recommend the right repair before the problem turns into a bigger, more expensive one. Contact us today to book a CCTV drain inspection or speak with one of our licensed plumbers.

FAQs

What is the best way to unclog a drain?

The best method depends on the type of blockage and where it’s located. 

For most minor blockages, start with removing any visible debris, flush the drain with hot tap water, try baking soda and vinegar for light build-up, or use a plunger or drain snake if needed. If the drain is completely blocked, multiple fixtures are affected, or DIY methods don’t work, it’s time to call a licensed plumber.

What is the most powerful drain unblocker?

Professional-grade chemical drain cleaners, such as sulfuric acid openers and industrial-strength caustic gels, are among the most powerful products available for dissolving grease, hair, and other organic matter.

However, the strongest option isn’t always the best one. The right solution depends on what’s causing the blockage. Chemical cleaners are often ineffective against solid obstructions, tree roots, or damaged pipes, and they can damage plumbing if used incorrectly. In many cases, a drain snake or professional drain clearing provides a safer and more effective solution.

Why does my drain keep clogging even after I clear it?

A blockage that keeps coming back usually means something’s built up further down the pipe than DIY methods can reach. Sometimes it’s grease and soap scum that’s layered up over months, so a bit of buildup keeps trapping hair and debris right after you clear it. 

Other times it’s a structural problem, such as a sag in the pipe, tree roots that have worked in through a joint, or a partially collapsed section. None of that shows up from the surface, so if a drain clogs repeatedly, you should get a plumber to run a camera through the line rather than repeating the same fix.

Can pouring boiling water down the drain damage pipes?

Yes, boiling water can damage PVC pipes. The extreme heat can soften them over time and weaken the joints, increasing the risk of leaks. Which is why we recommend using hot tap water when trying to loosen grease or soap residue, as it’s much safer for your plumbing while still being effective for minor blockages.