To unblock a toilet, stop a second flush so the bowl does not overflow, then use a flange plunger with a tight seal and push and pull firmly for 20 to 30 seconds. If the water level does not drop, a toilet auger fed into the trap clears most remaining blockages. When the toilet stays blocked or other fixtures back up too, the blockage is in the main drain and needs a licensed plumber.
Key takeaways
- Do not flush a second time. A blocked bowl that is already full will overflow onto the floor.
- A flange plunger beats a flat cup plunger because it seals inside the toilet trap.
- A toilet auger reaches blockages a plunger cannot and will not scratch the porcelain.
- Wet wipes are the most common cause of blocked toilets in Adelaide, even the wipes labelled flushable.
First, stop the bowl from overflowing
The moment you notice the water rising instead of draining, do not flush again. A second flush sends another full cistern of water into a bowl that cannot drain, and that is how a blockage turns into a flooded bathroom floor.
If the bowl is already near the rim, lift the cistern lid and push the flapper or float down to stop water entering the bowl. Then let the water level settle for 10 to 15 minutes. The level often drops on its own as a partial blockage seeps through, which makes the next steps cleaner and easier.
Plunge the toilet properly
A plunger clears most toilet blockages, but only the right type used the right way. Use a flange plunger, the kind with a soft rubber sleeve that folds out from the cup. The sleeve pushes into the toilet trap and forms the seal a flat plunger cannot.
- Make sure there is enough water in the bowl to cover the plunger head. Add water from a bucket if the bowl is low.
- Lower the plunger in at an angle so you do not trap air under the cup.
- Seat the flange into the bottom of the bowl, then push down and pull up firmly for 20 to 30 seconds.
- Keep the seal during the pull stroke. The suction on the way up does as much work as the push.
- Flush once to test. If the bowl drains normally, the blockage has cleared.
Use a toilet auger for stubborn blockages
If plunging does not shift it, a toilet auger, sometimes called a closet auger, is the next tool. It is built for toilets: a flexible cable inside a long sleeve with a rubber boot that protects the porcelain from scratches.
Feed the cable into the bowl outlet and turn the handle clockwise as you push. When you feel resistance you have reached the blockage. Keep turning to either break it up or hook it, then draw the cable back out. A hand auger reaches well past the trap, which is where wipes and toys most often lodge. Avoid a standard drain snake here, because the bare metal will scratch and chip the bowl.
When to call a licensed plumber
Some blocked toilets are a sign of a bigger problem in the drainage system. Call a licensed Adelaide plumber instead of persisting with DIY if any of the following applies.
- The toilet is still blocked after a solid plunging and auger attempt.
- The toilet gurgles, or the bath or shower backs up, when you flush.
- More than one toilet in the house is blocked at the same time.
- You suspect a child has flushed a solid object such as a toy or a toothbrush.
- Water or waste rises at the external gully trap when the toilet is flushed.
Why Adelaide toilets block in the first place
The single biggest cause of blocked toilets is wet wipes, including the ones marketed as flushable. They do not break down like toilet paper and they snag on any small imperfection in the pipe. Sanitary products, paper towel, and thick toilet paper cause the rest.
In older Adelaide suburbs with mature trees, tree roots are the other common culprit. Roots work into earthenware pipe joints looking for moisture, then catch passing waste until the line blocks. If your toilet blocks repeatedly, a plumber's CCTV camera will show whether wipes, roots, or a damaged pipe is behind it, which decides whether you need a drain clean or a pipe repair.