Osma 450mm diameter Universal Inspection Chamber Range for installations to a maximum of 1.2m (adoptable and non-adoptable). This 450mm diameter shaft is designed for use with Universal Inspection Chamber bases. The shaft sections are 305mm with an integral seal for quick and reliable push-fit connection. The final shaft section can be cut to length. Three shaft sections are required for a maximum 1.2m invert depth (adoptable and non-adoptable). There is a choice of five base configurations for equal and unequal pipe connections. Suitable for use with either 110/160mm OsmaDrain or 150mm UltraRib. Rated for loading applications up to 15kN (1.5 Tonne) in non-trafficked / landscaped areas. Can be used for higher loadings (max. 12.5 tonnes) when frames are supported by a concrete collar. Manufacturer: Wavin