The Amerex 240 utilizes the cooling, soaking and penetrating effect of a 45-55 ft. stream of WATER. The 55 sec. discharge time makes it very effective for inexperienced operators for use on Class A fires (ordinary combustibles). The model 240 may be freeze protected to -40ºF by adding a Model 506 Anti-Freeze charge (sold separately). Ships empty to be filled by end user.