If you have heard scratching, spotted droppings, or noticed unexplained damage around your property, there is a chance rodents are using the drainage network as a hidden route into your home or premises. We see it time and again across London and the South East: once a rodent discovers an easy access point, the problem can escalate quickly.
When it comes to rodent infestations, the best results come from combining the right investigation with the right physical barrier inside the drainage system.
Stop the scratching, stop rodent infestations by blocking the route they rely on most. Call 0800 999 1769 or email info@bndrainageltd.com.
Rodent issues linked to drainage are rarely solved properly by guesswork. To stop repeat incidents, you need clarity on where rodents are travelling, and what defects or openings they are exploiting.
Why rats in drains are more common than people think
When customers call us, they often ask one question first: “How are they getting in?” In many cases, the answer is the drainage system. Rodents are drawn by food smells, waste lines, and any weaknesses in the network. Even small faults such as cracks, displaced joints, or gaps can allow rodents to enter, then travel through sewer tunnels and up into domestic drains.
Common signs to watch for
Based on what we see on site, and the warning signs we advise customers to take seriously, look out for:
- Scratching or scurrying noises, especially at night
- Foul odours that suggest contamination in pipework
- Droppings around kitchens, pantries, or drain areas
- Physical damage, including gnaw marks and disturbed entry points
CCTV drain survey for rodent activity: Finding the route, not just the rodent
A CCTV drain survey for rodent activity gives us visibility. Once we know where rodents are travelling, we can recommend targeted repairs and the correct placement for protection devices.
What we are looking for during a survey
During a CCTV drain survey for rodent activity, we typically focus on:
- Structural weaknesses that rodents can exploit
- Junctions and runs where rodents travel through the system
- Areas where protective barriers will be most effective
- Any repairs needed to remove access opportunities
Rat gates: The quiet barrier that blocks re-entry
Once rodents have been removed and the drainage system is ready for prevention, rat gates are one of the most reliable long-term measures we install. Our systems are designed for drains, not drainpipes. They allow wastewater to flow out while blocking rodents from coming back in.
A properly fitted gate is a passive barrier. It works quietly, does not rely on chemicals, and does not need constant attention from you. Most importantly, it is installed where rodents try to travel, inside the drainage system itself, so it tackles the problem where it starts.
Quick reference table
| Approach | What it does | Best for | Limitation if used alone |
|---|---|---|---|
| Hygiene and waste control | Reduces attraction | Prevention support | Does not block entry routes |
| Repairs and sealing | Removes access through defects | Structural vulnerabilities | Needs correct diagnosis first |
| CCTV drain survey for rodent activity | Finds routes and defects | Targeted action | Does not physically block re-entry |
| Rat gates | Blocks rodents from returning via drains | Long-term prevention | Needs correct placement and a clear system |
| Rat gate installation by professionals | Ensures correct fit and sealing | Reliable outcomes | DIY attempts can be unsafe and ineffective |
Rat gate installation: Our practical process from diagnosis to protection
Effective rat gate installation starts before we ever fit a gate. First, we need confidence that the drainage system is clear of active rodents, then we confirm where rodents have been travelling, and finally we fit and seal the protection in the correct position.
Here is how we typically handle rat gate installation:
1) Start from a clean slate
Before prevention is installed, we make sure the drains are free of active rodents. This matters because installing barriers without addressing the current problem can leave you with continued disruption and uncertainty.
2) Confirm access routes
Where needed, we use a CCTV drain survey to confirm where rodents are travelling through the system. This helps us place protection where it will actually work.
3) Fit and seal the barrier
We fit the gate appropriately in the drain runs or junctions. When installed correctly, it allows full wastewater flow while preventing rodents from entering the system.
4) Keep it performing as it should
Our approach to installing a rat gate is designed for long-term performance. The gates we install are made from stainless steel, and we advise periodic checks, so the gate remains clear and secure.
Rodent prevention in London: When to act, and what helps most
We provide rodent prevention services across London and surrounding areas, and we often see the same risk factors increase the chance of rodents using drains as a pathway. Properties near open land, food establishments, or older drainage systems can face a higher likelihood of rodents using the sewers to reach homes.
The key is taking sensible steps early, and combining good habits with professional assessment and protection.
Your next step
Call us now to stop rodent infestations and book our support, including rat gate installation and surveys where needed. Reach us at 0800 999 1769 or email info@bndrainageltd.com.
FAQs
What causes rodent infestations linked to drainage?
Rodents can gain access through openings, cracks, or gaps in the drainage system, then travel through sewer tunnels into domestic drains. Once they find a reliable route, the issue can escalate quickly.
Can rats in drains lead to other drainage problems?
Yes. Rodents can contribute to blockages and contamination, and their activity can coincide with damage at entry points. If you suspect rats in drains, early investigation helps reduce wider disruption.
Do rat gates affect normal drainage flow?
When installed correctly, rat gates are designed to allow full wastewater flow while blocking rodents. You should not experience reduced drainage performance after professional fitting.
Do I need a CCTV drain survey for rodent activity before fitting a gate?
Not always, but it is often the best way to identify where rodents are travelling and where the barrier should be placed. A CCTV drain survey for rodent activity can also highlight defects that may need repair.
How long does rat gate installation typically take?
Time depends on access and what the survey shows, but once the drain run or junction point is confirmed, rat gate installation is typically a straightforward on-site job carried out by our engineers.
