The Osma 315mm Multi-base Inspection Chamber Base is a sturdy, reliable solution for your plumbing needs. It features 45° and 90° left-hand branches with a 110mm diameter, ensuring efficient water flow in various directions. Designed to withstand heavy-duty use, this Osma product offers an exceptional combination of durability and performance. The 4D933 model also comes with an inspection chamber base, allowing easy access for maintenance checks and repairs. The innovative design makes it suitable for both domestic and commercial applications.