Why Do Drains Back Up?

Drains back up when wastewater can't flow away through the drainage system as designed. The water has to go somewhere, so it rises back up through the lowest available outlet — usually a ground-floor shower, toilet, or external manhole. Understanding why it happens helps you take the right action quickly.

What to Look For

• Complete blockage in the main drain preventing any flow
• Partial collapse creating a restriction point
• Tree roots filling the pipe bore and trapping debris
• Fat, grease and wet wipes accumulating over time
• Public sewer surcharge during heavy rainfall
• Pipe gradient loss creating low points where waste pools

How We Diagnose the Problem

We attend urgently, contain the backflow, and use CCTV cameras to locate the exact cause. The camera shows whether it's a blockage (clearable with jetting), a structural failure (needs repair), or a public sewer issue (water company responsibility).

How We Fix It

We clear the immediate blockage with high-pressure jetting, then address the underlying cause. For structural failures, we repair using relining or excavation. For recurring problems, we can install non-return valves to prevent future backflow incidents.