A blocked toilet is one of those household emergencies that feels urgent and stressful. Before reaching for the phone to call a plumber, there are several DIY methods that clear most simple blockages in 10–30 minutes. Here's what to try — and in what order — so you can fix it yourself and avoid an unnecessary call-out fee.
Important first step: If the water level is close to the rim, turn off the water supply to the toilet immediately using the isolation valve at the back of the base. Turn it clockwise until it stops. Do not flush again until the blockage is cleared.
What Causes a Blocked Toilet?
Understanding what caused the blockage helps you choose the right fix. The most common culprits in Australian homes are:
- Too much toilet paper at once — the most common cause of simple blockages
- "Flushable" wipes — despite the label, these don't break down and are a major cause of blockages
- Foreign objects — toys, cotton buds, sanitary products, even phone cases
- A partial blockage that's built up gradually over multiple flushes
- Tree root infiltration in the sewer line — this requires a licensed plumber
- Calcium and limescale build-up — rare in most Australian areas
A quick way to identify the severity: if only your toilet is blocked but all other drains (sink, shower) run normally, the blockage is almost certainly in the toilet trap or close to it — and DIY methods are likely to work. If multiple drains are slow or blocked at the same time, you probably have a main sewer issue. In that case, skip straight to calling a licensed plumber.
Method 1 — The Plunger (Most Effective)
A plunger is the right first tool for almost every toilet blockage. The key is using the correct type and the correct technique.
Get the right plunger
You need a flange plunger — the kind with a rubber extension (flange) at the bottom that fits into the toilet drain. A flat cup plunger won't seal against the curved toilet outlet and won't generate enough force. Flange plungers are available at Bunnings for around $15–$25.
Add water to the bowl if needed
The plunger needs to be submerged in water to create a proper seal and generate hydraulic pressure. If the bowl is nearly empty, add water from a bucket until the plunger cup is covered.
Position and seal the plunger
Lower the plunger into the bowl at an angle to let trapped air escape, then position it squarely over the drain opening. You want a tight, gap-free seal between the rubber flange and the porcelain.
Plunge with increasing force
Push down slowly on the first stroke to expel remaining air without breaking the seal, then pull up sharply. Repeat 10–15 times with increasing force — the pull stroke is what dislodges the blockage. Keep the seal intact throughout.
Test with a flush
If the water drains normally, the blockage is clear. Flush once carefully to confirm. If the bowl drains but slowly, repeat the plunging sequence 2–3 more times before moving on to another method.
Repeat if needed
Plunging often takes more than one round. Give it 3–4 full attempts (of 10–15 strokes each) before concluding it isn't working. Persistence pays off with most paper-based blockages.
Smear a thin layer of petroleum jelly (Vaseline) around the rubber lip of the plunger before you start. This creates a better seal against the porcelain and makes the plunger noticeably more effective.
Method 2 — Hot Water and Dish Soap
This method works well for soft blockages caused by toilet paper or organic material. The soap lubricates the blockage while the hot water softens and helps force it through.
Add dish soap
Squirt a generous amount of dish soap — around a quarter-cup — directly into the toilet bowl. Let it sit for a couple of minutes to work its way toward the blockage.
Heat the water — but not to boiling
Heat a large pot or bucket of water until it's very hot but not boiling. Boiling water can crack porcelain. Hot tap water is too cool to be effective — you want water that's steaming but not at a rolling boil.
Pour from waist height
Pour the hot water into the bowl from around waist height. The force of the falling water combined with the heat helps break up the blockage and push it through.
Wait, then flush
Leave it for 10–15 minutes to let the heat and soap penetrate the blockage. Then flush to check. Repeat if needed — two or three rounds can shift stubborn paper blockages.
Method 3 — A Toilet Auger (Drain Snake)
If plunging and hot water haven't worked, a toilet auger (also called a closet auger) can reach blockages that are deeper in the pipe — beyond where the plunger can exert pressure.
A toilet auger has a rubber or vinyl-coated end to protect the porcelain, a flexible cable, and a hand-crank mechanism. They're available at Bunnings for $30–$60 and are a good tool to have on hand. Note that a toilet auger is different from a general-purpose drain snake — the protective coating matters for porcelain surfaces.
Insert the auger end into the drain
Place the rubber-coated end of the auger into the toilet drain opening. Hold the tube against the bowl to protect the porcelain from scratches.
Crank clockwise to advance the cable
Turn the crank handle clockwise to feed the cable deeper into the pipe. Keep steady, even pressure — don't force it. If you feel resistance, you've likely reached the blockage.
Break up or hook the blockage
Continue cranking at the point of resistance. The auger tip will either break through the blockage and clear it, or hook a foreign object so you can pull it out.
Withdraw slowly and flush
Crank counter-clockwise to retrieve the cable slowly. If you've hooked an object, pull it out carefully. Flush to confirm the blockage is clear.
Method 4 — Baking Soda and Vinegar
This method is best for mild or partial blockages rather than complete ones. The chemical reaction creates fizzing action that can help shift soft material. It's a good first attempt when you don't have a plunger to hand.
Add baking soda
Pour 1 cup of bicarbonate of soda (baking soda) directly into the toilet bowl, aiming for the drain opening.
Add white vinegar slowly
Slowly pour 2 cups of white vinegar into the bowl. It will foam — that's completely expected and harmless. Adding it slowly prevents the foam from overflowing the bowl.
Wait 30 minutes
Let the mixture sit and work on the blockage for at least 30 minutes. Longer is better for partial blockages.
Follow with hot water and flush
Pour a pot of very hot (not boiling) water into the bowl, wait a few minutes, then try flushing. If this method doesn't work after two rounds, move on to the plunger or auger.
What NOT to Do
- Don't use boiling water — it can crack the porcelain bowl or cistern
- Don't use chemical drain cleaners (like Drano) in toilets — they're designed for sink drain hair and grease, not toilet blockages. They can damage the rubber seals in the toilet mechanism and rarely fix the actual problem
- Don't keep flushing if the water is near the rim — you'll overflow the bowl onto the floor
- Don't use a flat cup plunger — it won't seal against the toilet drain opening
- Don't insert anything rigid like a broom handle or screwdriver — you risk scratching, cracking, or permanently damaging the porcelain
How Much Does a Plumber Charge to Unblock a Toilet?
If DIY methods don't work, here's what you can expect to pay a licensed plumber to clear a blocked toilet in Australia. Prices vary by state and company, but these are typical 2026 ranges.
| Service | Typical cost |
|---|---|
| Call-out + basic unblocking (plunger or manual) | $150–$250 |
| Drain snake / auger service | $200–$350 |
| High-pressure water jetting | $300–$500 |
| CCTV drain camera inspection | $250–$400 |
| Removal of foreign object | $200–$500 |
When to Call a Plumber
Call a licensed plumber if any of the following apply: All DIY methods have failed after 2–3 attempts. Multiple drains (sink, shower, toilet) are slow or blocked simultaneously. You hear gurgling sounds in other drains when you flush. You suspect a foreign object is lodged deep in the pipe. You can hear or smell sewage from outside pipes. The toilet has been slow-draining for weeks rather than suddenly.
How to Prevent Future Blockages
The most reliable way to avoid blocked toilets is to be strict about what goes down them.
- Only flush toilet paper — even products labelled "flushable" (wipes, period products, cotton buds) should go in the bin
- Don't use the toilet as a general bin — it's not designed for it
- Consider a toilet paper holder that makes it easy to tear off smaller amounts
- For heavy loads, flush twice — once during, once after
- If your home is older than 30 years or has large trees in the garden, have your sewer line inspected every few years. Tree root infiltration is a silent issue that builds up gradually