Rats entering through drains is a common hidden cause of infestations
Many homeowners are surprised to discover that rats entering through drains are responsible for persistent infestations inside their homes.
Rats are excellent swimmers and frequently travel through underground sewer systems. If a drain pipe becomes cracked, displaced, or poorly connected, it can allow rats entering through drains to escape the pipe network and access the structure of a building.
Once this happens, rats may move into:
- sub-floor voids
- wall cavities
- kitchen pipe spaces
- utility rooms
- attic areas
If you are hearing scratching under floors or noticing repeated rat activity despite pest control treatments, the problem may be rats entering through drains rather than a simple outdoor infestation.
Our specialised CCTV drain survey service in Dublin is designed to identify exactly where rats entering through drains are gaining access.
Why rats entering through drains are difficult to detect
Standard pest control inspections cannot always reveal the real source of a rat problem.
When rats entering through drains are involved, the entry point may be hidden underground inside the drainage system. In these cases, traps or baiting alone may not solve the issue permanently.
Signs that rats entering through drains may be the cause include:
- rats appearing inside ground-floor kitchens or bathrooms
- scratching noises under floorboards
- repeated rat activity even after treatments
- droppings appearing indoors without obvious entry holes
- foul drain smells combined with rat sightings
When these symptoms appear, a professional drain investigation is often the only reliable way to identify the problem.
CCTV drain survey to locate rats entering through drains
Our CCTV drain survey uses a high-resolution camera inserted directly into your drainage system. This allows our technicians to inspect underground pipework and identify defects that may allow rats entering through drains.
During a drain survey we look for:
- cracked or collapsed pipes
- displaced joints
- open pipe connections
- broken clay drains
- rat burrowing points
The camera inspection provides a clear picture of where rats entering through drains are escaping from the pipe system.
Once the problem area is located, we can recommend the appropriate repair or proofing solution.
Repairing drains to stop rats entering through drains
Once the CCTV survey identifies the defect, several repair solutions may be possible depending on the condition of the pipe.
Common repairs include:
- replacing broken drain sections
- sealing displaced joints
- installing rat flaps inside pipes
- repairing collapsed drains
- removing rat access burrows
By repairing the damaged pipework, the route used by rats entering through drains is permanently closed.
This approach addresses the root cause of the infestation rather than repeatedly treating symptoms.
When a drain survey is recommended
A CCTV drain inspection is particularly useful if you experience:
- rats under floorboards
- repeated rat infestations in the same property
- unexplained indoor rat sightings
- signs of rats emerging from drains
- pest activity in properties connected to older drainage systems
Many older Dublin properties have clay drainage pipes that may have cracked or shifted over time. These faults can easily allow rats entering through drains to reach the structure of the building.
A complete solution: pest control and drainage investigation
Because our team specialises in pest control, we understand how rats behave inside drainage systems.
Our service combines:
- pest control expertise
- CCTV drain inspection
- Smoke tests
- rat proofing solutions
- drainage repair recommendations
This integrated approach allows us to identify and eliminate rats entering through drains more effectively than a standard drain contractor who may not recognise the pest entry points.
Local service across Dublin
We provide drain investigations and pest control services throughout Dublin and surrounding areas.
Our technicians regularly investigate cases of rats entering through drains in South Dublin (Dublin 2, D.4, D.6, D14, Dundrum, Rathfarnham, Sandyford, Stillorgan etc.) and North Dublin (Dublin 1, D.3, D.7, Santry, Baldoyle, Castlenock etc.)
If you suspect rats entering through drains in your home, early investigation can prevent a minor problem from developing into a major infestation.
Examples Of Common Repairs
High-Pressure Jetting & Vacuum Suction
The Jetting shoots water at extremely high pressure into drains and pipes, breaking up stubborn blockages like grease, sludge, roots, and debris. Then the Vacuum Suction extracts the dislodged waste, sludge, contaminated liquids, and even materials like sand.
Broken AJs With Rat Burrows
When PVC AJs get damaged, rats start burrowing from the sewer and come out at ground level. We excavate the pipework and replace faulty AJs.
Broken Manhole Frames
Manhole concrete frames can get damaged over time. We rebuild these so rodents cannot get in or out.
Plastic Air Vent Covers
When rats chew through plastic air vents, we cover them with metal vents to prevent future issues.
Why Is a Drain Pipe Survey Crucial for Pest Control?
Sewer pipe defects are a leading cause of rodent infestations, allowing pests to easily access your home or business. Smoke tests and CCTV pipe surveys provide clear, accurate evidence of existing issues, ensuring quick remedial actions and long-term pest prevention.
Why Choose Owl Pest Control Ltd for Your Drain Pipe Services?
Experienced & Certified Technicians: Fully licensed, insured, and trained drainage professionals.
Advanced Technology: Cutting-edge CCTV inspection and smoke-testing equipment for accurate diagnostics.
Comprehensive Pest Expertise: Unique integration of drainage and pest control expertise.
Proven Track Record: Trusted by hundreds of satisfied clients across Dublin.
Responsive Service: Quick response times and flexible scheduling to minimise disruptions.
Transparent Pricing: Detailed assessments with no hidden charges.
Do You Have an Issue With Rats Under Floors?
If you are dealing with persistent rat activity and suspect the drains may be involved, our real case study shows exactly what a proper investigation looks like from start to finish.
You will see how we used CCTV drain surveying to trace the true entry point, what the repair process involved, and how we achieved a permanent solution, not just a short-term reduction in activity. Click through to read the full story and get a clear idea of what to expect from our drain survey and repair service.
Book a drain investigation
If you suspect rats entering through drains or under floors, contact our team today.
A professional CCTV drain survey can quickly determine whether the drainage system is the source of the problem and allow the appropriate repair to be carried out.
Our experienced technicians will investigate the drainage system and provide clear recommendations to stop rats entering through drains permanently.
CONTACT FORM - QUICK RESPONSE
Frequently Asked Questions
► What are common signs of a drain problem?
Common signs include foul odours, slow drainage, recurring blockages, unusual noises from pipes, rodent sightings, fly infestation, or subsidence around drains.
► What is involved in a CCTV drain survey?
A specialised waterproof camera is inserted into pipes, transmitting high-quality video footage to identify blockages, leaks, or damage.
Yes. Rats are strong swimmers and often travel through sewer systems. If a drain pipe becomes cracked, displaced, or poorly sealed, rats can escape from the pipe network and enter the structure of a building.
► How long does a drain pipe CCTV survey take?
Typical surveys last between 1 to 2 hours, depending on pipe length and complexity of the drainage system.
► How often should I have my drain pipes surveyed?
We recommend a routine CCTV drain survey every 2–3 years, or immediately after noticing any drainage problems or pest activity.
Guidance from the British Pest Control Association states that around 80 % of rat infestations originate from drainage defects, making CCTV drain inspections key for early detection and prevention.
