Lays down requirements for plastics inspection chambers for use in the construction of drainage systems. Applicable to chambers of circular cross section with a maximum internal diameter of up to 600 mm. Three grades of inspection chambers are specified as I, II and III. Their use on site is dependent upon position and installation procedures. Specifies materials, dimensions and tolerances, physical and performance characteristics and marking for plastics inspection chambers for drains. Some points to be borne in mind when ordering an inspection chamber are given as are methods of test. Guidance on installation and quality control for the manufacture.

BS 7158(2001) : 2001