At first glance, a rat blocker may seem like a simple product. A couple of flaps inside a sewer pipe. How difficult can it be?
The reality is quite different.
A mechanical rat blocker must operate 24/7, year after year, in the harsh environment of a live sewer system. At the same time, it must effectively prevent rats from entering through the drainage network without restricting the free flow of wastewater.
That’s why a high-quality rat blocker is about far more than a pair of flaps in a pipe. It must be engineered for decades of reliable performance while remaining easy to install, service, and document.
At Rat-Blocker.com, we work with a network of authorised drainage contractors and professional installers who exclusively install the TX11 LOCK and TX26 LOCK. Developed and manufactured by Nordisk Innovation, these rat blockers are built on more than 20 years of product development and proven performance in over 350,000 installations across Europe.
The strongest recommendation often comes from the professionals who work with the product every single day.
“The only rat blocker worth using.”
Over the past 10 years, we have installed more than 10,000 rat blockers from Nordisk Innovation. Throughout that time, we have tested products from other manufacturers, but we’ve found that Nordisk Innovation is the only company that consistently delivers a product that meets our requirements and quality standards. TX11 is the most reliable rat blocker on the market. – Morten Slott Jacobsen, StopRotterne
This experience reflects the philosophy behind Rat-Blocker.com: connecting homeowners, businesses, and housing associations with professional installers who rely on proven, field-tested solutions.
Innovation Starts with Understanding the Problem
Rats only become a problem once they find a way into a building.
In many cases, that route is through the sewer system.
According to Rolf Bekker Ravnskov of NIRAS, around 90% of rat infestations in Copenhagen originate from defective sewer pipes. Many private drainage systems were installed more than 50 years ago, and it is the responsibility of property owners to ensure that these pipes remain structurally sound and watertight.
Once rats gain access through the sewer system, they can cause extensive damage to buildings and infrastructure while also posing a significant health risk.
At Nordisk Innovation, we chose a different approach.
Instead of focusing on eliminating rats after they have entered a building, our goal was to stop them from getting in the first place.
That philosophy led to the development of the TX11 LOCK, which you can learn much more about in the video below.
More Than 350,000 Installations Provide Experience That Can’t Be Simulated
A rat blocker is not validated through laboratory testing alone.
It is proven through years of real-world performance.
With more than 350,000 installations, Nordisk Innovation has built extensive expertise in how mechanical rat blockers perform across a wide range of drainage systems and operating conditions.
Every installation provides valuable insights into:
- different types of drainage systems
- wastewater flow conditions
- mechanical loads
- maintenance requirements
- rat behaviour
- long-term durability
This experience is continuously used to refine and improve Nordisk Innovation’s rat blockers.
The result is a product built on real-world experience—not just engineering drawings and laboratory testing.
Why Professional Installers Choose TX11 LOCK
Professional installers need a rat blocker that is reliable, versatile, and easy to maintain.
TX11 LOCK was engineered with exactly that purpose in mind.
Patented Locking System for Enhanced Protection
TX11 LOCK features a patented locking mechanism combined with a dual-flap design incorporating specially engineered teeth.
If a rat attempts to force its way through the blocker, the design creates a wedge effect against the bottom of the pipe, making it extremely difficult for the animal to pass.
The result is an effective mechanical barrier that helps protect properties against rat intrusion.
Designed for Fast Installation and Reliable Operation
In most cases, TX11 LOCK can be installed quickly and safely from ground level using Nordisk Innovation’s specially developed installation tool.
Flexible side wings adapt to minor variations in pipe and chamber dimensions, ensuring a secure fit. The same installation tool also makes inspection and maintenance fast and straightforward.
Robust Construction – Proven in More Than 350,000 Installations
TX11 LOCK is engineered to withstand the demanding conditions inside sewer systems and is manufactured from acid-resistant AISI 316 stainless steel, providing outstanding corrosion resistance and a long service life.
With more than 350,000 installations across Europe, TX11 LOCK has proven its performance under real-world conditions and delivers reliable protection year after year.
Proven Quality
Designed and manufactured in Denmark, TX11 LOCK meets a range of recognised quality standards, including:
- More than 350,000 installations across Europe
- Designed and manufactured in Denmark
- Patented technology
- VA approval
- WRc approval
- Acid-resistant AISI 316 stainless steel
- 10-year warranty against corrosion perforation
- 5-year warranty on moving parts
These are just some of the reasons why TX11 LOCK is trusted by municipalities, water utilities, housing associations, and professional contractors throughout Europe.
Developed with Professionals – Continuously Improved Through Experience
At Nordisk Innovation, we do not consider TX11 LOCK a finished product.
Insights gained from more than 350,000 installations, combined with ongoing collaboration with authorised drainage contractors, municipalities, water utilities, and pest control professionals, are continuously used to refine and improve the product.
Maintaining close relationships with the professionals who install and service TX11 LOCK every day is an essential part of our product development process.
Find a Professional Installer
A rat blocker is only as effective as the solution selected and the quality of its installation.
At Rat-Blocker.com, you can find a network of professional installers with extensive experience in the installation and maintenance of TX11 LOCK.
Contact an installer near you for expert advice on the solution best suited to your property.
Who Is Behind TX11 LOCK?
TX11 LOCK is designed and manufactured by Nordisk Innovation, a Danish company specialising in innovative solutions for the drainage and utility sectors.
For more than 20 years, Nordisk Innovation has developed mechanical rat blockers that now protect more than 350,000 properties across Europe.
