Specifies requirements for batch-type washers and washer/disinfectors that accommodate, wash, disinfect by thermal means (if a disinfector) and either partially or totally dry surgical instruments, utensils and anaesthetic equipment in health care facilities (including tubing). Machines complying with this Standard may be either single-purpose or multipurpose types, and may be supplied either with or without a disinfecting stage or a drying stage. Also, many of the principles set out in This Standard may be applied to larger machines such as trolley-washing machines. Machines are not intended to treat single-use equipment, endoscopes, mechanical equipment, electrical components, bedpans or urine bottles. Guidance on information that should be supplied with enquiries and orders is given in an appendix.