Blocked outside drain

What this symptom usually tells you

The most useful clue is whether the problem is isolated or appears elsewhere. Clear only accessible surface debris; deeper work may require rods, jetting or camera diagnosis.

• Identify whether the gully takes rainwater or wastewater
• Check nearby access chambers from ground level
• Look for leaves and surface debris
• Stop indoor water use if the level rises

Choose the next step, not the strongest option

Start with visible debris and the least aggressive suitable manual method. A repeat blockage, sewage backup or several affected fixtures needs diagnosis rather than another product.

• Check every nearby fixture
• Identify anything already poured into the drain
• Keep a note of gurgling, odour and water-level changes
• Stop before wastewater overflows

Step-by-step approach

1. 1

   Stop using the affected fixture

2. 2

   Check whether the problem is isolated

3. 3

   Remove only safely reachable debris

4. 4

   Try one suitable method if the signs support it

5. 5

   Escalate if flow is not restored or the symptom returns