03/10/2026
If you’ve lifted your drain cover and found the channel full of shingle and mud, it means surface water and debris is entering the system where it shouldn’t.
This usually happens when rainwater gullies or soakaways have broken or collapsed or rats have moved in, allowing soil and gravel to wash into the pipework. Over time, this build up blocks the flow and can cause blockages or foul smells.
It’s important not to ignore it. The drain may need jetting and CCTV inspection to locate the source of the problem before it worsens.