FlowTHRU™ drain is an integrated stainless steel threshold drainage for seamless indoor–outdoor living.

For homeowners looking to create a clean, uninterrupted transition between their indoor and outdoor spaces, the FlowTHRU™ integrated drainage system provides the perfect foundation. Paired with AluGlaze sliding or bi-fold doors, this system allows you to achieve a true flush sill, where internal and external floor levels align without the need for raised thresholds.

A flush sill threshold not only enhances accessibility and reduces trip hazards; it also delivers a sleek architectural finish that visually extends your living space. However, achieving this look requires careful attention to drainage, as traditional door sills rely on height differences to manage water.

The FlowTHRU™ drain solves this challenge by directing water into a recessed stainless steel trough, efficiently handling runoff from door panels and preventing moisture from entering the home. This protects internal floor finishes such as timber, tiles and carpet, ensuring long-term durability and peace of mind.

Featuring an anti-slip stainless steel grate tested for performance, FlowTHRU™ is engineered to withstand harsh conditions and is compatible with a wide selection of high-performance sliding and bi-fold systems. The result is a drainage solution that blends seamlessly with your door hardware while meeting stringent performance requirements, all without compromising your desired flush floor aesthetic.