What is the Legionella risk with Automist? Technical Support July 06, 2019 14:46 Updated Automist is dry pipe system, which is drained after commissioning and therefore mitigates the chances of legionella. Download our legionella risk assessment. Related articles Can I add battery backup? Do I really need a fire door between ground and first floor? What electrical connection is required for Automist? How much does the annual maintenance cost? Is Automist suitable for high rise retrofit? Comments 0 comments Please sign in to leave a comment.