Specifies requirements for batch-type washers and washer/disinfectors that accommodate, empty, flush, wash, disinfect by thermal means (if a disinfector) and either partially or totally dry surgical instruments, utensils, human waste receptacles and anaesthetic equipment (including tubing) in health care facilities. Such machines may be either single-purpose or multi-purpose types, and may be supplied either with or without a disinfecting stage or a drying stage. Many of the principles set out can be applied to larger machines such as trolley washing machines. It is not intended that such machines treat single-use equipment, endoscopes, mechanical equipment or electrical components. Guidance on informaiton that should be supplied with enquiries and orders is given in an appendix.