Infiltration Sewer

Wavin slotted twin wall pipes combine rainwater transport and infiltration into the surrounding soil. They are as easy to inspect and clean as standard sewer pipes. Made from virgin polypropylene, these pipes are highly durable, with a fifty year life under severe loading conditions.

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System Information

Transport and infiltrate

Wavin slotted twin-wall pipes allow water to infiltrate into the surrounding soil while transporting the flow. This reduces the rainwater load on the system endpoints, minimizing the risk of flood or back-up. Easy to inspect and clean, monitoring and maintenance are minimized.

Smart wall profile

Our slotted twin-wall pipes have a smart ridged wall profile which wins over smooth-wall pipes every time. The smart profile increases infiltration capacity, as proved both in our labs and in the field though independent testing.


Like all Wavin products, slotted twin-wall sewer pipes meet all relevant regulation and compliance standards. Made of virgin polypropylene, our pipes deliver fifty years’ service under even the toughest conditions.

What’s next?

Wavin was the first to market these slotted twin-wall infiltration pipes. In hundreds of projects around the world, they are used to connect collection and infiltration systems. Wavin design services will provide you with a complete plan, optimizing chamber spacing and end-point overflow.