A blocked drain is rarely random. There's almost always a specific, findable cause — and knowing what you're actually dealing with saves you from pouring another bottle of drain cleaner down a pipe that needs something else entirely.

The usual suspects

  • Fat, oil, and grease build-up— the most common kitchen drain blocker. It cools and hardens inside the pipe, narrowing it over time until water can barely pass.
  • Hair and soap scum— the classic bathroom drain combination. Soap residue traps hair, and the clump grows until it catches everything else that goes down.
  • Root intrusion— tree roots seek out moisture and will find their way into even small cracks in older sewer lines, especially in established gardens around George and Knysna.
  • Sandy soil movement— in coastal areas like Sedgefield and Wilderness, shifting sandy ground can put uneven pressure on buried pipework, creating low points where debris collects.
  • Foreign objects— wet wipes (even ones labelled “flushable”), sanitary products, and toys are frequent causes of sudden, complete toilet blockages.

What you can safely try yourself

  1. A plunger, used correctly with enough water in the bowl or basin to create a seal, is genuinely effective for many simple blockages.
  2. A drain snake (hand auger) can clear hair and soap build-up in bathroom drains without chemicals.
  3. Hot (not boiling, on PVC pipes) water flushed through a kitchen drain can help with early-stage grease build-up.

When to stop and call a plumber

If a blockage keeps returning after clearing it, that's a sign the cause is further down the line than you can reach — root intrusion, a collapsed section of pipe, or a genuine low point in sandy ground. Repeated chemical drain cleaner use can also damage older pipework, particularly the galvanised steel still found in some George Central and Blanco homes.

We use drain cameras and proper clearing equipment to find the actual cause rather than guessing, which matters most for recurring blockages, multiple fixtures blocking at once (usually a sign of a main line issue, not a single drain), or any sewage smell indoors.

A drain that blocks once might be bad luck. A drain that blocks repeatedly has a specific cause worth finding — clearing the symptom every few months costs more over time than fixing it properly once.