The Osma 450mm diameter Universal Inspection Chamber Base is designed for installations up to a maximum of 1.2m, suitable for both adoptable and non-adoptable situations. This base is intended for use with the 450mm Universal Inspection Chamber shaft (4D975) and features an 110mm straight channel with four 110mm branch entries (two at 45° and two at 90°, left/right hand). It is compatible with 110mm OsmaDrain components and comes with 3 profiled, blank-off plugs for unused side entries. The Universal IC can handle a maximum invert depth of 1.2m. It offers a choice of five base configurations for equal and unequal pipe connections, and can be used with either 110/160mm OsmaDrain or 150mm UltraRib pipes.