Stored Pressure fire extinguishers are available in Water, Foam, Powder and Wet Chemical. In stored pressure fire extinguishers, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used, different propellants are used. With dry chemical fire extinguishers, nitrogen is typically used; water and foam extinguishers typically use air. Stored pressure fire extinguisher are the most common type. If you cannot find the item you require please contact us.