Introducing the IW50BB Invisiweep Wall Weep Timloc, the almost-invisible, multi-function wall weep designed to efficiently discharge water from external walls. Suited for use with the Timloc cavity tray system, over external lintels and on external masonry walls, the IW50BB provides an innovative solution that meets all NHBC requirements and British standards: BS5250, BS5628 and BS8215. Specifically designed to maximize drainage efficiency, the IW50BB features a patent-pending venturi effect outlet tube that reduces water pressure while maintaining optimal flow rate. The 500mm extension of Invisiweep is perfect for render and wider walls and can be easily cut down to size when necessary for specific construction projects. When you're looking for a safe, reliable solution for discharging water from external walls, look no further than the IW50BB Invisiweep Wall Weep Timloc. Perfect for any situation including at ground floor slab level within cavity tray systems, over external lintels or on external masonry walls, this top-of-the-line product will stand up time after time in even the most challenging environments.