When using this type of extinguisher on a Class B fire, you must be careful to avoid splashing liquid fuels. The foam has the ability to make water float on fuels that are lighter than water. You should immediately evacuate an area after using an extinguisher of this type. Larger wheeled units are available up to 150 pounds. Stream reach is about 8 to 18 feet.
Discharge time is dependent on the size of extinguisher.
They have a range of 5-20 feet, although they can be easily affected by wind. Discharge time is 10-25 seconds. Return to Contents Using Hand-Held Fire Extinguishers Extinguishers have their limits A portable fire extinguisher can save lives and property by putting out a small fire or containing it until the Fire Department arrives. Portable extinguishers are not designed to fight a large or spreading fire. It must be available and in working order, fully charged.