Step 1: Do not flush again
This is the big one. If the water rose higher than normal on the last flush, another flush is how it ends up on your floor. The bowl only holds one flush of margin.
Step 2: Wait five minutes
Water pressure does some of the work for you. A partial blockage will often let the bowl slowly drain back to normal level. If it does, you've got a partial block — still worth fixing properly, but you're not in flood territory.
Step 3: Plunge it — properly
Most people plunge wrong. Here's the technique that works:
- Use a flange plunger (the one with a rubber sleeve) — a flat sink plunger can't seal a toilet.
- Push in gently first to expel air, then pump firmly 10–15 times without breaking the seal.
- The pull matters as much as the push — the suction on the way back is what breaks up most clogs.
Step 4: Check the rest of the house
Flush other toilets, run the shower for ten seconds. If more than one fixture is slow or gurgling, the blockage is in your main drain — not the toilet — and no amount of plunging will fix it. That's a job for a drain machine or jetter.
When to stop DIYing and call
- Plunging hasn't worked after two solid attempts
- Multiple fixtures are backing up or gurgling
- Water or sewage is coming up in the shower or floor waste
- It's your only toilet and the household needs it working today
- This is the second or third blockage in a few months — that's a symptom of tree roots or pipe damage, not bad luck
The honest bit
Around the Blue Mountains, repeat toilet blockages are very often tree roots in old clay sewer pipes. Clearing the blockage gets you flushing again; a camera inspection tells you whether it's going to keep happening. Ask for both — any decent plumber will show you what the camera sees.