Quick answer
Toilet blockages come from too much paper, foreign objects in homes with small children, wet wipes, or a partial blockage further down the line. The key question is whether it clears and stays clear. A one-off blockage that clears with an auger is a local obstruction. One that returns within a day or two is downstream, and no amount of plunging at the pan will fix a problem in the sewer line.
Common causes
- Excess paper, particularly with a low-flush or water-saving cistern
- Wet wipes, including ones labelled flushable — they do not break down
- Sanitary products, cotton buds and dental floss binding together in the trap
- Foreign objects, which is the usual answer in homes with small children
- Downstream blockage in the branch or main line backing up into the pan
- Poor fall on the branch line letting solids settle before they reach the main
What you can do now
- 1Stop flushing — each flush adds to the volume that has to go somewhere
- 2Use a closet auger rather than a plunger; an auger reaches the trap where a plunger only pushes
- 3Do not combine chemical drain cleaner with plunging, which splashes caustic liquid back at you
- 4Check whether other fixtures are also slow — if the bath and basin are too, the problem is downstream
- 5Note how quickly it returns after clearing, since that timing is the most useful thing you can tell a plumber
When to call a professional
If you have augered it and the blockage returns within a day, the obstruction is downstream and needs a CCTV drain inspection rather than another unblock. Call immediately if waste is backing up into a shower or gully, which means the main line is affected and is a health hazard. Repeated blockages in the same toilet usually indicate a structural fault, not user error.
Typical cost in Johannesburg
Unblock R450–R950 · CCTV inspection R1,200
Indicative ranges only. We provide written, itemised quotes before any work.
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