A well-functioning drainage system is essential for maintaining a healthy and safe property. Over time, drains can develop issues due to blockages, cracks, root intrusion, or general wear and tear, leading to unpleasant odors, slow drainage, or even structural damage.
Understanding the different types of drain repairs available can help homeowners and businesses address these problems efficiently, minimising disruption and preventing costly repairs. From simple unblocking techniques to advanced no-dig solutions like resin lining and full-scale excavations, each repair method is tailored to specific drainage issues. In this guide, we’ll explore the most common drain repair techniques and what they involve.
Common Drain Problems Requiring Repairs
Drainage systems can develop various issues over time due to blockages, structural damage, or environmental factors. Identifying these problems early can help prevent costly repairs and property damage. Below are some of the most common drain problems that require professional attention:
Blocked Drains
One of the most frequent drainage issues, blockages that occur due to the buildup of grease, hair, food waste, or foreign objects. In outdoor drains, fallen leaves, dirt, and tree roots can obstruct water flow. Symptoms include slow drainage, unpleasant odors, and gurgling sounds from pipes.
Cracked or Collapsed Pipes
Over time, drainpipes can crack due to ground movement, heavy traffic above the surface, or general wear and tear. If left untreated, these cracks can lead to leaks, soil erosion, or complete pipe collapse, requiring urgent repair or replacement.
Corrosion and Pipe Deterioration
Older drainage systems, especially those made of metal or clay, are prone to corrosion and deterioration. This can lead to leaks, reduced water flow, and potential contamination of surrounding soil or water sources.
Root Intrusion
Tree roots naturally seek out moisture and can infiltrate drainpipes through small cracks or joints. Once inside, they grow and expand, causing severe blockages, pipe damage, and even structural failures. Specialised root removal and pipe relining are often required to fix this issue.
Misaligned or Displaced Joints
Drainpipes can shift over time due to ground movement, poor installation, or heavy loads above ground. When joints become misaligned, water leakage and debris buildup can occur, leading to blockages and further structural damage.
Types of Drain Repairs and Their Processes
When drainage issues arise, the right repair method depends on the severity and type of problem. Below are the most common drain repair techniques, along with their processes and benefits.
Drain Cleaning and Unblocking
Best for: Minor blockages caused by grease, food waste, hair, or debris.
Process:
- A professional assessment is done to identify the blockage.
- Methods such as high-pressure water jetting, drain snaking, or rodding are used to clear obstructions.
- In stubborn cases, CCTV drain surveys may be used to locate hidden blockages.
Benefits: Quick, cost-effective, and non-invasive.
Drain Relining (No-Dig Repair)
Best for: Cracked, leaking, or slightly damaged pipes without full replacement.
Process:
- A CCTV survey is conducted to assess the pipe’s condition.
- A flexible resin-coated liner is inserted into the damaged pipe.
- The liner is inflated, allowing the resin to cure and form a new, watertight pipe within the old one.
- The pipe is inspected again to ensure proper sealing.
Benefits: Minimal disruption, cost-effective, and extends pipe lifespan.
Drain Excavation and Replacement
Best for: Severely damaged, collapsed, or misaligned pipes.
Process:
- The affected area is excavated to expose the damaged pipe.
- The old or broken section is removed and replaced with a new, durable pipe.
- The excavated area is carefully backfilled and restored.
Benefits: Permanent solution for serious damage, though more disruptive and expensive.
CCTV Drain Surveys
Best for: Diagnosing hidden problems like cracks, misaligned joints, or root intrusion.
Process:
- A high-resolution camera is inserted into the drain.
- The footage is analysed to identify any structural issues or blockages.
- Based on findings, an appropriate repair solution is recommended.
Benefits: Accurate, efficient, and prevents unnecessary excavation.
Root Cutting and Removal
Best for: Tree roots invading and blocking pipes.
Process:
- A CCTV survey is used to locate the root intrusion.
- Mechanical root-cutting tools or hydro-jetting are used to clear the roots.
- In severe cases, chemical root inhibitors or pipe relining may be applied to prevent regrowth.
Benefits: Restores full drainage function and prevents future blockages.
How to Choose the Right Drain Repair Solution
Choosing the right drain repair solution depends on the severity of the issue, cost considerations, and long-term effectiveness. For minor blockages caused by grease, debris, or food waste, drain cleaning methods such as high-pressure water jetting or rodding are sufficient. If the problem involves small cracks or leaks, drain relining offers a non-invasive and cost-effective solution by reinforcing the existing pipe.
However, in cases of severe damage, collapsed pipes, or major misalignment, excavation and full pipe replacement may be necessary. No-dig solutions like resin lining are ideal for minimising disruption, while CCTV drain surveys help to accurately diagnose issues before selecting the best repair method. Consulting with Total Drainage Services ensures the most efficient and durable solution, preventing costly repairs in the future.
