Siphon Blast: A term used to describe the type of abrasive delivery system used on an abrasive blasting cabinet. A siphon machine uses an injection gun to create suction on the abrasive supply hose. The abrasive hose then conveys the abrasive, using suction or siphon, to the gun where the compressed air hose is used to accelerate the abrasive. All siphon type machines include two hoses on the abrasive blast gun assembly. Siphon machines are the most common type of blast machine. All siphon gun assemblies include an air jet used to create the siphoning effect and also establish the amount of compressed air required to operate the machine.