International Valve Marketing presents catalogues on its Vent-O-Mat air release vacuum break valves, made of stainless steel. These valves are intended to provide a solution to surge problems. Vent-O-Mat valves are designed to be of benefit with initial filling, pump trip conditions, pipeline operating and surge. Vacuum protection is a built-in integral part of each valve. Valves are all-stainless bodies, and range in size from 1″ to 8″ as standard. Larger sizes are available.