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Top Hatting

Top Hatting for Drains and Sewers

Traditional methods of repairing damaged sewer pipes often involve extensive excavation, disruption, and costly restoration. Fortunately, there’s a smarter and more efficient solution – top hatting. This innovative technique is revolutionising the way we rehabilitate sewer and drainage systems, offering a range of benefits that make it a top choice for infrastructure operators and property owners.

What is Top Hatting?

Top hatting is a trenchless pipe rehabilitation method specifically designed for lateral connections in sewer and drainage systems. It’s commonly used to repair or rehabilitate the lateral sewer pipes that connect individual buildings or properties to the main sewer line. This technique involves the installation of a specialized liner, referred to as the “top hat liner,” to restore the connection point.

What are the benefits of Top Hatting?

Minimal Disruption

Top hatting is a non-invasive solution. It eliminates the need for extensive excavation and trenching, which means minimal disruption to your property, landscaping, or daily activities.


This method often proves more cost-effective than traditional pipe replacement because it reduces labour and restoration expenses significantly.

Speedy Repairs

Top hatting can be completed swiftly, reducing downtime and allowing you to return to normal activities sooner.

Structural Integrity

The top hat liner creates a structurally sound and watertight connection, restoring proper flow and preventing leaks or blockages.


Top hatting offers a durable solution, ensuring your sewer and drainage system remains in excellent condition for years to come.


This technique can be applied to a wide range of pipe materials and sizes, making it suitable for residential, commercial, and industrial applications.

Our Core Services


Hot & Steam Cure


Our Solutions

SWD Lining Ltd is a specalist provider of drain and sewer lining installation services for private and public organisations. Our expertise lies in our people, a team of specialists with the knowledge and experinece to get the job done on time, with minimal disruption and the highest quality of workmanship.

Through our sister company SW Drainage Solutions Ltd, we offer complete drainage solutions from jetting and tankering to septic tank emptying and pump maintenance, enabling us to over a complete package of drainage services.

Our Accreditations & Approvals

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