Volkes Ltd., Henley Park, Guildford Surrey, have introduced a new range of liquid filters. The Microwire is a fully motorized self‐cleaning filter in which some of the main flow is back‐flushed to atmosphere through the element direct to waste or, alternatively, through a Microdise secondary filter and then returned to the main system. The range covers four types, i.e. automatic or continuous operation, with or without secondary Microdisc filter. Applications include water, aqueous solutions or oils up to a maximum viscosity of 500 Redwood No. 1.