The Osma 315mm Multi-base Inspection Chamber Base, including a 90° right-hand branch with a 110mm diameter (product code: 4D912), is an essential component for modern drainage systems. This high-quality, durable product from Osma offers a practical solution for underground drain layouts in residential or commercial buildings. Its designed to provide an access point for cleaning, testing, and inspection of the drainage system, ensuring efficient operation and preventing potential blockages. With its unique 90° right-hand branch configuration, this chamber base allows for streamlined direction change in your drainage system.